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