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

Try widening your search to All Fields.

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

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