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)
"complementaridade constraints problemaass" » "complementaridade constraints problemaaass" (Expand Search), "complementaridade constraints problemasaass" (Expand Search), "complementaridade 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 contained problem\") OR (\"complementaridade constraints problemaass\"))~".
• Removing quotes may allow a broader search: (( complementar contained problem ) OR ( complementaridade constraints problemaass ))~.
• Adding a wildcard symbol may retrieve word variants: (("complementar contained problem") OR ("complementaridade constraints problemaass"))*.