|Keyword Search Tips|
|Adjacency||To search multiple words as a phrase enclose them in quotes.
Example : "world health organization"
Without the quotes all words are searched as if joined by the and operator (all words must be present but can be anywhere).
|Boolean Operators|| Use and or or to specify multiple words in any field, any order. Combine these with not to specify exclusions and use parentheses to group expressions.
Example : stocks and bonds
Example : (alaska or canada) and (adventure and not vacation)
|Wildcards|| Truncate the end of a word with an asterisk (*) and use a question mark (?) to replace a single character anywhere in a word.
Example : environment* polic*
Example : wom?n
|Proximity Operators|| To specify words close to each other in any order, enclose them in quotes and add a tilde (~) followed by the maximum number of other words between them.
Example : "fractal spectra"~5
|Result Set Grouping||Results for simple searches are grouped by relevance to bring the most likely titles to the top of the list. Each group represents a similar level of relevance and results are sorted within the group by date or title. Complex searches return ungrouped results; to force ungrouped results use a set of quotes around a word.|