Web Mining - is implementation of advance web search. Now you do not need to remember syntax to narrow your search. Just type your words and syntax will be created automatically. Try it

Here is a list of implemented syntax:

Google Search

• All words search returns pages that include all of your search terms (search terms).
• Phrase search returns pages that include an exact phrase ("phrase search").
• "OR" search to find pages that include either of two search terms.
• Negation will not return pages with these search terms (-terms)
• Synonym search to search not only for your search term but also for its synonyms, place the tilde sign (~terms) immediately in front of your search term

• In url restricts your search to the URLs of web pages (inurl:terms)
• In title restricts your search to the titles of web pages (intitle:terms).
• In text searches only body text (intext:terms).

• Domain search to search only within one specific website (search terms site:domain)
• File search returns links to documents with the given file type (search terms filetype:txt).

More details on Google Web Search Help