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Boolean
| Operator | Description |
| " " | With quotation marks the search engine searches for all words in that order. Use it, when you search for a product name or a whole phrase. |
| AND | Using AND to separate search terms returns documents containing both words (or phrases in ""). If no operator is specified between words, AND is assumed. Sometimes, you also can use + too. |
| OR | Using OR to separate search terms returns documents containing either of the words (or phrases in ""). Some engines do not support mixed use of AND and OR in a single query. |
| NOT | NOT is used to exclude a word (or phrase in "") from the search results. Some engines convert NOT to -, some do not support term exclusion at all. |
| NEAR | NEAR is a keyword that few engines support. It is used to return documents that contain both terms within 10 to 25 words. AND will be used, when a engine does not support it. |
| LINK: | When you search with the option link:http://www.indianz.ch, then it will search for sites who have a link to www.indianz.ch. |
| URL: | With url:indianz, an engine will search for sites who have the word indianz in the adress of the url. |
| TITLE: | Entering title:indianz will let the engine search for sites who have the word indianz in the document title. |
| ( ) | Parenthesis may be used to construct a more complicated Boolean expression. For example, (indianz OR indy) NEAR (web-site OR web-place) AND news searches for news about my Web-Place. Not all engines support this. |