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