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