Perhaps you should try some spelling variations:
"computers / computer linear / bisacsh" » "computers / computers linear / bisacsh", "computers / computed linear / bisacsh", "computers / computer lunar / bisacsh"
"computers / computer literacy / bisacsh" » "computers / computer literary / bisacsh"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("computers / computer literacy / bisacsh") OR ("computers / computer linear / bisacsh")).
• Removing quotes may allow a broader search: (( computers / computer literacy / bisacsh ) or ( computers / computer linear / bisacsh )).
• Adding a wildcard symbol may retrieve word variants: (("computers / computer literacy / bisacsh") or ("computers / computer linear / bisacsh"))*.