The success of your search will depend, in large part, on the keywords and phrases that you select. You can search them in combination or use the advanced search features and Boolean AND, OR & NOT to expand or narrow your results. For more savvy search tips, see the guide: How To: Begin Your Research Here. Hint: put phrases in quotations!
Here are some sample search combinations for Philosophy:
The library has a wide variety of encyclopedias and dictionaries devoted to philosophy. Try Credo Reference's mind mapping functionality to make connections related to your topic!