Advanced Queries Help

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Wildcard characters (asterisks: *) can be added to any query term.
The position of the wildcard specifies where zero or more other characters may appear.
For contains queries, wildcards are effective only at the ends of words.

A contains query operator searches for items that contain words (including plural, gerund and past tense forms) that match your query terms. Boolean operators may be used with these queries.
An equals query operator searches for items that exactly match your query terms. When wildcards are specified, it looks for substrings that match your terms.

Examples:

Query Type	Query Term	Searches for…	Example Matches
contains	`inhibit`	…items that contain the query term word (and its grammatical variations).	molt-inhibiting hormone Migration-Inhibition Factors
contains	`inhibit*`	…items that contain words beginning with the query term (and its grammatical variations).	Same as above, plus: active site-inhibited Glu-Gly-Arg-factor IXa growth inhibitory proteins Growth Inhibitors inhibitin Walsh inhibitor
equals	`ddt`	…items that exactly match the query term.	DDT
equals	`ddt*`	…items that begin with the query term.	DDT DDTMSP
equals	`*ddt`	…items that end with the query term.	DDT 1-DFDDT alpha-chloro-DDT
equals	`ddt`	…items that contain occurrences of the query term substring anywhere within them.	DDT 1-DFDDT alpha-chloro-DDT DDTMSP CEDDTC
equals	`d*dt`	…items that begin with the pre-wildcard substring, end with the post-wildcard substring, and may have characters between them.	DDT desmethyl-ADT DMDT
equals	`name:ddt`	…official/primary names that exactly match the query term.	DDT

Whenever you use the contains query type, you may separate words using the Boolean operators & (and) and | (or). (e.g., “estrogen & endometrial”). If multiple words are separated only by blank spaces (no Boolean operators), then an implicit & (and) operator is inserted between them.
Use & (and) to search for items that contain at least one occurrence of each of the query terms.
Use | (or) to search for items that contain at least one occurrence of any of the query terms.
Operators are processed left-to-right. & (and) binds more tightly than | (or).