Perhaps you should try some spelling variations:
"fisica matematica computer programmers." » "fisica matematica computer programming.", "fisica matematica computers programming.", "fisica matematica computer program."
"ciencias mathematics computer programs." » "ciencias matematicas computer programs.", "sciences mathematics computer programs.", "financial mathematics computer programs.", "ciencias mathematics computer programas.", "ciencias mathematics computer programa."

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: (("fisica matematica computer programmers.") or ("ciencias mathematics computer programs."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("fisica matematica computer programmers.") OR ("ciencias mathematics computer programs.")).
• Removing quotes may allow a broader search: (( fisica matematica computer programmers. ) or ( ciencias mathematics computer programs. )).
• Adding a wildcard symbol may retrieve word variants: (("fisica matematica computer programmers.") or ("ciencias mathematics computer programs."))*.