Google Scholar is very similar to Google; you can use many of the same search options.
nurse stress retention
"social learning theory"
"On the Origin of Species"
("first grade" OR "second grade")
(theory OR model)
You can also use the advanced Google Scholar search to create your search string. Creating a complex Google Scholar search can be difficult.
A good Google Scholar strategy is to try multiple searches, adjusting your keywords with each search.
Use the Cited by link to find articles and books that cite a specific article.
The cited by feature is a great way to find more recent articles and to trace an idea from its original source up to the present.
For more complex searches, try Google Scholar's Advanced Search page.
The advanced search allows you to search more precisely.
See how the search differs between a library database and Google Scholar.
Video: Google Scholar Advanced Search
(1 min 18 sec) Recorded January 2018
Video: Find an article by title in Google Scholar
(2 min 38 sec) Recorded January 2018