Perhaps you should try some spelling variations:
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"comicas mathematics computer programs." » "copulas mathematical computer programs.", "sciences mathematics computer programs.", "comicas mathematics computer programas.", "comicas mathematics computer programa."

Try widening your search to All Fields.

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

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"comicas matematicas computer programs.\") OR (\"comicas mathematics computer programs.\"))".
• Removing quotes may allow a broader search: (( comicas matematicas computer programs. ) OR ( comicas mathematics computer programs. )).
• Adding a wildcard symbol may retrieve word variants: (("comicas matematicas computer programs.") OR ("comicas mathematics computer programs."))*.