For Google searching, I have learned to type exact phrase or word in Google advance search to get more specific results. We can narrow results by choosing the "domain"we want, like .gov,.org, .edu etc. It also allows to select "language", 'File Type" , " region" of results.
Additionally, in the session two, I have known five useful database: emerald, LISA, web of knowledge, Scopus and ACM.
I think phrase searching is very useful, you can use quotation marks to enclose the phrase, like "alcohol abuse".