Google searches are not case sensitive. All letters, regardless of how you enter them, are understood as lower case. For example, searches for george washington, George Washington, and George washington all return the same results.
To provide the most accurate results, Google does not use "stemming" (key matching for partial-words) or support "wildcard" searches. Rather, Google searches for exactly the words entered into the search box. For example, searching for airlin or airlin* will not yield "airline" or "airlines". If in doubt, try both forms, for example: airline and airlines.
To enter a query, type in a few descriptive words and press the enter/return key, click the magnifying glass, or click the search button for a list of relevant results.
Google uses sophisticated text-matching techniques to find pages that are both important and relevant to your search. For instance, Google analyzes not only the candidate page, but also pages linking to it in order to determine the value of the candidate page for your search. Google also prefers pages in which your query terms are near each other (for example, given the query information technology, Google will boost results containing the phrase "information technology" over those containing "information driven by technology").
Note: Encrypted, viewable PDF documents are converted to HTML for indexing; however, the HTML is not displayed.
By default, Google returns only those pages that include all entered search terms. There is no need to include "and" between terms. For example, to search for engineering product specification documents, simply enter the phrase.
To broaden or restrict the search, include fewer or more terms.
Google supports the logical "OR" operator. To retrieve pages that include either word A or word B, use an uppercase "OR" between terms. The following search will return results for offices in either London or Paris.
You can exclude a word from your search by putting a minus sign ("-") immediately in front of the term you want to exclude. Make sure you include a space before the minus sign. For example, the following search will return pages about bass that do not contain the word music.
You can search for phrases by adding quotation marks. When searching for phrases, words enclosed in double quotes ("like this") appear together in all returned documents. Phrase searches using quotation marks are useful when searching for famous sayings or specific names.
Additionally, certain characters serve as phrase connectors. Phrase connectors work like quotation marks and join your search words in the same way. For example, the following search is treated as a phrase search even though the search words are not enclosed in double quotes.
Google recognizes hyphens, slashes, periods, equal signs, and apostrophes as phrase connectors.