Perhaps you should try some spelling variations:
"complementarity contained problematica" » "complementar contained problematica" (Expand Search), "complementaridade contained problematica" (Expand Search), "complementarity obtained problematica" (Expand Search), "complementarity contained problemastica" (Expand Search)
"complementarity constraints problema" » "complementar constraints problema" (Expand Search), "complementaridade constraints problema" (Expand Search), "complementarity 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 problematica") OR ("complementarity constraints problema"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"complementarity contained problematica\") OR (\"complementarity constraints problema\"))".
• Removing quotes may allow a broader search: (( complementarity contained problematica ) OR ( complementarity constraints problema )).
• Adding a wildcard symbol may retrieve word variants: (("complementarity contained problematica") OR ("complementarity constraints problema"))*.