Perhaps you should try some spelling variations:
"complementarity contained problemaaass" » "complementaridade contained problemaaass" (Expand Search), "complementarity obtained problemaaass" (Expand Search), "complementarity contained problemas" (Expand Search), "complementarity contained problemaaaass" (Expand Search), "complementarity contained problemasaaass" (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("complementarity contained problemaaass") OR ("complementar constraints problem"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"complementarity contained problemaaass\") OR (\"complementar constraints problem\"))*".
• Removing quotes may allow a broader search: (( complementarity contained problemaaass ) OR ( complementar constraints problem ))*.