Perhaps you should try some spelling variations:
"complementarity constrained problemassa" » "complementar constrained problemassa" (Expand Search), "complementaridade constrained problemassa" (Expand Search), "complementarity contained problemassa" (Expand Search), "complementarity constrained problematica" (Expand Search)
"complementarity constraints problemas" » "complementar constraints problemas" (Expand Search), "complementaridade constraints problemas" (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: "((\"complementarity constrained problemassa\") OR (\"complementarity constraints problemas\"))~".
• Removing quotes may allow a broader search: (( complementarity constrained problemassa ) OR ( complementarity constraints problemas ))~.
• Adding a wildcard symbol may retrieve word variants: (("complementarity constrained problemassa") OR ("complementarity constraints problemas"))*.