Perhaps you should try some spelling variations:
"complementarity constrained problematica" » "complementaridade constrained problematica" (Expand Search), "complementarity contained problematica" (Expand Search), "complementarity constrained problemaatica" (Expand Search), "complementarity constrained problemasatica" (Expand Search)
"complementar constraints problem" » "complementar constraints problema" (Expand Search), "complementar constraints problemas" (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: "((\"complementarity constrained problematica\") OR (\"complementar constraints problem\"))~".
• Removing quotes may allow a broader search: (( complementarity constrained problematica ) OR ( complementar constraints problem ))~.
• Adding a wildcard symbol may retrieve word variants: (("complementarity constrained problematica") OR ("complementar constraints problem"))*.