How to get the best result from google search? Here are some keywords which can be used to get the result more accurately. I got this informations from here. If you know more keywords please comment here. Here we go...
Intitle: If we give Intitle: at the beginning of a query word or phrase (intitle:"Java") restricts your search results to just the titles of Web pages.
Intext: does the opposite of intitle:, searching only the body text, ignoring titles, links, and so forth. Intext: is perfect when what you're searching for might commonly appear in URLs. If you're looking for the term HTML, for example, and you don't want to get results such as www.mysite.com/index.html, you can enter intext:html.
Link: lets you see which pages are linking to your Web page or to another page you're interested in. For example, try typing in link:http://www.pcmag.com.
site: (which restricts results to top-level domains) with intitle: to find certain types of pages. For example, to get any info from a government website the we can give [Searchitem] site:gov.
Daterange: (start date–end date). You can restrict your searches to pages that were indexed within a certain time period. Daterange: searches by when Google indexed a page, not when the page itself was created. This operator can help you ensure that results will have fresh content (by using recent dates), or you can use it to avoid a topic's current-news blizzard and concentrate only on older results. Daterange: is actually more useful if you go elsewhere to take advantage of it, because daterange: requires Julian dates, not standard Gregorian dates.
population of [country] : We can easily get the population of the country by this query.
rphonebook: and bphonebook: Suppose you want to contact someone and don't have his phone number handy. Google can help you with that, too. Just enter a name, city, and state. (The city is optional, but you must enter a state.) If a phone number matches the listing, you'll see it at the top of the search results along with a map link to the address. If you'd rather restrict your results, use rphonebook: for residential listings or bphonebook: for business listings. If you'd rather use a search form for business phone listings, try Yellow Search
filetype:[extension]: If you prefer to see a particular set of results with a specific file type (for example, PDF links), simply type filetype:pdf.
define: To see a definition for a word or phrase, simply type the word "define:," then a space, and then the word(s) you want defined. For example, the search [define:e=mc2] will show you a list of definitions for "e=mc2" gathered from various online sources.
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