Perhaps you should try some spelling variations:
"complementaridade constrained problemassa" » "complementaridade contained problemassa" (Expand Search), "complementaridade constrained problemas" (Expand Search), "complementaridade constrained problematica" (Expand Search), "complementaridade constrained problemasssa" (Expand Search)
"complementarity constraints problema" » "complementar constraints problema" (Expand Search), "complementarity constraints problemas" (Expand Search)

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

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