---
id: wiki-2026-0508-advanced-search-operators
title: Advanced Search Operators
category: 10_Wiki/Topics
status: verified
canonical_id: self
aliases: [Search Operators, Google Dorks, Query Operators]
duplicate_of: none
source_trust_level: A
confidence_score: 0.9
verification_status: applied
tags: [search, information-retrieval, osint, productivity]
raw_sources: []
last_reinforced: 2026-05-10
github_commit: pending
tech_stack:
  language: query-dsl
  framework: google-bing-ddg
---

# Advanced Search Operators

## 매 한 줄
> **"매 search operator는 매 검색의 inverse index에 대한 직접 명령"**. 매 1990년대 boolean 검색에서 출발해 매 2026 LLM-augmented search (Perplexity, Claude search, GPT-5 browse) 시대에도 매 underlying engine은 여전히 operator-driven, 매 power user 의 productivity multiplier.

## 매 핵심

### 매 Operator 분류
- **Boolean**: `AND`, `OR`, `NOT` (or `-`) — 매 logical combination.
- **Phrase**: `"exact phrase"` — 매 token sequence 강제.
- **Field-restrict**: `site:`, `intitle:`, `inurl:`, `filetype:`, `intext:` — 매 specific field 검색.
- **Range / numeric**: `2020..2025`, `before:2026-01-01`, `after:2025-06-01`.
- **Wildcard**: `*` — 매 missing word.
- **Cache / archive**: `cache:`, `web.archive.org/web/*/url`.

### 매 엔진별 차이
- **Google**: 매 strict, `site:`, `filetype:`, `intitle:`, `before:`, `after:` 지원.
- **Bing**: `site:`, `language:`, `loc:`, `feed:`.
- **DuckDuckGo**: `!bang` (`!w wikipedia`, `!gh github`).
- **GitHub**: `repo:`, `path:`, `language:`, `extension:`, `is:issue is:open`.
- **Perplexity / Claude**: 매 natural language 도 OK 지만 매 explicit operator 가 더 reliable.

### 매 응용
1. **OSINT**: 매 leaked credential 검색 (`"@company.com" filetype:txt site:pastebin.com`).
2. **Research**: `site:arxiv.org "diffusion transformer" after:2025-01-01`.
3. **Debugging**: `site:stackoverflow.com [exact error message]`.
4. **Competitive intel**: `site:competitor.com filetype:pdf intitle:"roadmap"`.

## 💻 패턴

### Pattern 1: Site-restricted academic search
```
site:arxiv.org intitle:"mixture of experts" after:2025-01-01 -survey
```
매 specific venue 의 fresh primary research, 매 review article exclude.

### Pattern 2: GitHub code archaeology
```
repo:anthropics/claude-code path:**/*.ts "AbortController" language:TypeScript
```
매 specific repo + path glob + literal token + language filter.

### Pattern 3: Wayback Machine snapshot
```
https://web.archive.org/web/2024*/openai.com/pricing
```
매 historical pricing change track (매 2024 모든 snapshot).

### Pattern 4: Filetype hunt
```
"annual report" filetype:pdf site:tesla.com
```
매 specific document format 의 corporate disclosure.

### Pattern 5: Negative filtering
```
"react server components" -tutorial -beginner -"how to"
```
매 advanced content only, 매 entry-level material exclude.

### Pattern 6: Boolean composition
```
("vector database" OR "vector store") AND (pgvector OR qdrant) -benchmark
```
매 synonym expansion + scope narrowing.

### Pattern 7: Numeric range
```
"GPU memory" 40..80GB site:nvidia.com
```
매 spec range 검색.

### Pattern 8: Intitle + intext combo
```
intitle:"system design" intext:"rate limiting" intext:"token bucket"
```
매 multi-keyword content discovery.

### Pattern 9: Stack Overflow targeted
```
site:stackoverflow.com "TypeError: Cannot read properties of undefined" "useEffect"
```
매 specific error + context.

### Pattern 10: DDG bang chaining
```
!gh microsoft/vscode editor.contribution
```
매 instant redirect to GitHub 매 search.

## 매 결정 기준
| 상황 | Approach |
|---|---|
| 매 fresh research | `after:` + `site:arxiv.org` / `site:openreview.net` |
| 매 specific error | exact `"message"` + `site:stackoverflow.com` |
| 매 corporate intel | `filetype:pdf site:company.com` |
| 매 code search | GitHub `repo:` + `path:` + `language:` |
| 매 historical | Wayback `web.archive.org/web/<year>*/url` |
| 매 ambiguous topic | Boolean OR + negative filter |

**기본값**: 매 quoted phrase + `site:` + `after:` 조합 — 매 noise 의 80% 제거.

## 🔗 Graph
- 부모: [[Search]] · [[Information Retrieval]]
- 응용: [[Codebase_Onboarding]] · [[Research-Methodology]]
- Adjacent: [[Pyramid Principle]] · [[Knowledge synthesis]]

## 🤖 LLM 활용
**언제**: 매 LLM agent 가 web search tool 호출 시 — 매 explicit operator 로 query 작성하면 매 retrieval precision 급상승. 매 Claude / GPT-5 의 browse tool 도 매 underlying Google/Bing 사용 → operator pass-through.
**언제 X**: 매 conceptual / synthesis question — 매 LLM 이 직접 reasoning. 매 operator 는 매 specific document/fact retrieval 용.

## ❌ 안티패턴
- **너무 많은 operator**: 매 5개 이상 stacking 매 zero result. 매 progressive narrowing 의.
- **Quoted long phrase**: `"the quick brown fox jumps over"` — 매 too specific. 매 3-5 word key phrase 가 sweet spot.
- **`site:` over-restriction**: 매 single domain 만 보면 매 broader context 손실.
- **Stale cache reliance**: `cache:` 는 Google 에서 2024 deprecated — 매 web.archive.org 사용.

## 🧪 검증 / 중복
- Verified (Google Search Central docs 2026, GitHub Search syntax docs).
- 신뢰도 A.

## 🕓 Changelog
| 날짜 | 변경 |
|---|---|
| 2026-05-08 | Phase 1 |
| 2026-05-10 | Manual cleanup — operator taxonomy + 10 patterns + LLM browse 매 통합 |
