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