Perhaps you should try some spelling variations:
"competencias basicas computer programmers." » "competencias basicas computer programs.", "competencias basicas computer programming.", "competencias basicas computers programming.", "competencias basic computer programmers.", "competencias pascal computer programmers.", "competencias business computer programmers.", "competencias basicas computer programsmers."
"basicas mathematics computer program." » "basicas matematicas computer program.", "business mathematics computer program.", "basicas mathematics computer programs."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("competencias basicas computer programmers.") or ("basicas mathematics computer program."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("competencias basicas computer programmers.") OR ("basicas mathematics computer program.")).
• Removing quotes may allow a broader search: (( competencias basicas computer programmers. ) or ( basicas mathematics computer program. )).
• Adding a wildcard symbol may retrieve word variants: (("competencias basicas computer programmers.") or ("basicas mathematics computer program."))*.