The system searches through all information (incl. publishers, place of publication etc...) you get a lot more results, but they may not all be relevant.
Searching with Subject Headings
Using Subject Headings will give you specific results.
Example: only books that are labeled "Middle East--Civilization--History
Finding More eBooks
Database Searching: eBooks
A digital library of academic journals, books, and primary sources with a humanities focus.
A database of encyclopedias and specialized reference sources for multidisciplinary research.