Perhaps you should try some spelling variations:
"complementaridade constrained problema" » "complementaridade contained problema" (Expand Search), "complementaridade constrained problemas" (Expand Search)
"complementar constraints problemastic" » "complementar constraints problemasstic" (Expand Search), "complementar constraints problematic" (Expand Search), "complementar constraints problematica" (Expand Search), "complementar constraints problematicas" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"complementaridade constrained problema\") OR (\"complementar constraints problemastic\"))~".
• Removing quotes may allow a broader search: (( complementaridade constrained problema ) OR ( complementar constraints problemastic ))~.
• Adding a wildcard symbol may retrieve word variants: (("complementaridade constrained problema") OR ("complementar constraints problemastic"))*.