Perhaps you should try some spelling variations:
"complementaridade constrained problemaaasaasasasa" » "complementaridade contained problemaaasaasasasa" (Expand Search), "complementaridade constrained problemaaaasaasasasa" (Expand Search), "complementaridade constrained problemasaaasaasasasa" (Expand Search)
"complementarity constraints problem" » "complementar 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: (("complementaridade constrained problemaaasaasasasa") OR ("complementarity constraints problem"))~.
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