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