Search for
Type your query in the text box under the Search for heading. Your query can be a word, phrase, question, file name, or other set of characters. Your query can be up to 255 characters long.

Search using
The Search tool matches the words in your query to the words in its index. You can decide if you want Search to match:

All words. This option returns results that contain at least one occurrence of every word or quoted phrase you typed. Note that Search automatically filters out common words like “a,” “and,” “the,” “these,” and so forth.
Exact phrase. This option returns only those results that contain at least one occurrence of the exact string of words you typed in the exact order you entered them. Note that Search automatically filters out common words like “a,” “and,” “the,” “these,” and so forth. Search is not case sensitive, nor is it affected by punctuation in exact phrase searches. In an Exact phrase search, you can type in the exact text of an error message or article headline, if you have this information. You do not need to add quotes.
Any words. This option returns results containing at least one occurrence of at least one of the words or quoted phrases you entered. Note that Search automatically filters out common words like “a,” “and,” “the,” “these,” and so forth. This is the least specific type of search. If you are having trouble getting results for your query, use the Any words option.
Boolean search. This option returns results based on Boolean logic. Boolean searching is used mostly by advanced searchers with specific information needs. Search supports the standard Boolean operators and syntax: And (and, &); Or (or, |); Not (and not, &!); and related precedence operators such as (), "", and so forth.