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