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