Perhaps you should try some spelling variations:
"complementaridade constrained problemas" » "complementaridade contained problemas" (Expand Search)
"complementarity constraints problemass" » "complementar constraints problemass" (Expand Search), "complementarity constraints problema" (Expand Search), "complementarity constraints problems" (Expand Search), "complementarity constraints problemes" (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 problemas") OR ("complementarity constraints problemass"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"complementaridade constrained problemas\") OR (\"complementarity constraints problemass\"))*".
• Removing quotes may allow a broader search: (( complementaridade constrained problemas ) OR ( complementarity constraints problemass ))*.