What's great about Google Scholar
and then "Library Links") 
The largest scholarly, multidisciplinary, full-text database.
Articles from scholarly journals in humanities including literary criticism.
Scholarly journals in the arts and sciences in full text.
Communications-related journal articles including advertising, public relations, linguistics, and literature.
Includes a wide range of journals in the social sciences.
For best results use 2-3 keywords connected by AND / OR / NOT
Put "phrases in quotation marks"
Use (parenthesis) to develop a complex search
Check your spelling
Use the facets on the left hand side of results to narrow down your search
Examples:
"New York City" AND "police brutality"
("Harlem Renaissance" OR "blues poetry") AND "New York"
"Edgar Allan Poe" AND Criticism