Perhaps you should try some spelling variations:
"complementaridade constrained problem" » "complementaridade contained problem" (Expand Search), "complementaridade constrained problema" (Expand Search), "complementaridade constrained problemas" (Expand Search)
"complementar constraints problemass" » "complementar constraints problemaass" (Expand Search), "complementar constraints problemasass" (Expand Search), "complementar constraints problemas" (Expand Search), "complementar constraints problema" (Expand Search), "complementar constraints problems" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"complementaridade constrained problem\") OR (\"complementar constraints problemass\"))~".
• Removing quotes may allow a broader search: (( complementaridade constrained problem ) OR ( complementar constraints problemass ))~.
• Adding a wildcard symbol may retrieve word variants: (("complementaridade constrained problem") OR ("complementar constraints problemass"))*.