Simply enter the word you wish to find and the search engine will search for every instance of the word in the book entries. For example: circle. All book entries containing the word circle in the selected fields will show up on the results page.
Using a wildcard (*) will increase the odds of finding the results you are seeking. For example: scien*. The search results will display every instance of sciene, sciences, scientific, etc. More than one wildcard may be used.
Searches are not case sensitive. For example: ft. k* will come up with the same results as Ft. K*.