On the results screen use the "Resource Type" options on the left toolbar to limit your results to print books, eBooks, articles, etc. Note down the library name and call number for books -- you need this information to locate the book. For articles, click for online access, or request a scan.
Keywords are the essential elements that describe complex ideas and topics; the important, descriptive nouns and verbs. Do not try to search phrases or sentences—find keywords.
Focus on the concepts at the heart of your question first. Using these core concepts you will generate several relevant keywords that will better focus your search results.