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