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 problemaaaticas" » "complementar constraints problemaaaaticas" (Expand Search), "complementar constraints problemasaaaticas" (Expand Search), "complementar constraints problematicas" (Expand Search), "complementar constraints problematica" (Expand Search), "complementar constraints problematicos" (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 problemaaaticas\"))~".
• Removing quotes may allow a broader search: (( complementaridade constrained problem ) OR ( complementar constraints problemaaaticas ))~.
• Adding a wildcard symbol may retrieve word variants: (("complementaridade constrained problem") OR ("complementar constraints problemaaaticas"))*.