You can also use the advanced search option for more precise searching.
There are many options to explore in the drop-down options of Advanced Search. For example, here is one sample advanced search, where the material type "books" has been selected:
You can apply filters to your results, to fine tune your search. Look at the left hand column for filter options.
After selecting a filter, be sure to click the green "Apply Filters" button to activate the filter.
Commonly used filters include: