Using the pull-down menus in Advanced Search, choose the keyword option to search the title, abstract, and descriptors simultaneously. If the database has identifiers, these are searched also.

To search for a single word, enter that word (e.g., seismicity).

If you find too few items, broaden your search using:

The Boolean Operator OR between related words or words of similar meaning. For example: biosphere or ecosphere retrieves records containing either term.

If you find too many items, narrow your search using:

The Boolean Operator AND between words. For example: mir and nasa retrieves records containing both terms. Specifically, this search is processed as:

TI=(nasa and mir) or AB=(nasa and mir) or DE=(nasa and mir) or ID=(nasa and mir)

For more details on searching by field, see Fielded Search.