Searching using keywords lets users find or match words in the articles themselves. Users can search individual subjects or terms or combine or exclude topics using the AND, OR, and NOT connectors. Enclose phrases in quotation marks.
And finds articles that contain both terms (e.g., drugs and sports) Or finds articles that contain either or both terms [e.g., sports or athletics)
Notfinds articles that contain one term but not another (e.g., gypsy not moths)
cloning AND ethics
gambling AND California AND native Americans
art NOT modern (find articles contain the term art but not the term modern)