Create a list of broad and narrow keywords for your topic. If you need keyword ideas, use a thesaurus or an encyclopedia (see Getting Started with Research).
Check your spelling!
Search using just keywords. Don't type sentences. Use only 2 or 3 keywords at a time.
Use AND, OR, NOT between keyword
AND - all results will have ALL words
OR - results will contain EITHER one word OR the other
Presentation skills : one hour workshop by 
The Challenge of Effective Speaking in a Digital Age by 
