Perhaps you should try some spelling variations:
"complementar constrained problemasa" » "complementar contained problemasa" (Expand Search), "complementar constrained problemas" (Expand Search), "complementar constrained problema" (Expand Search), "complementar constrained problems" (Expand Search), "complementar constrained problemaasa" (Expand Search), "complementar constrained problemasasa" (Expand Search)
"complementarity constraints problem" » "complementaridade constraints problem" (Expand Search), "complementarity constraints problema" (Expand Search), "complementarity constraints problemas" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("complementar constrained problemasa") OR ("complementarity constraints problem"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"complementar constrained problemasa\") OR (\"complementarity constraints problem\"))".
• Removing quotes may allow a broader search: (( complementar constrained problemasa ) OR ( complementarity constraints problem )).
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