If you want to include more than one term in a field search, use parentheses () to enclose your search terms, or quotation marks (" ") to search for an exact phrase. The example above ("american revolution") searches for the exact phrase "american revolution" rather than treating it as a phrase search (american AND revolution).
Some other examples:
- ti:cat dog will find the word cat in the item title field and the word dog in any field
- ti:(cat dog) will find the words cat and dog in the item title field in any order
- ti:"color purple" will find the exact phrase color purple in the item title field
- ti:(peacekeeping AND "united nations") will find the word peacekeeping and the phrase united nations in the item title field