Perhaps you should try some spelling variations:
"complementaridade contained problem" » "complementaridade obtained problem" (Expand Search), "complementaridade contained problema" (Expand Search), "complementaridade contained problemas" (Expand Search)
"complementar constraints problematicas" » "complementar constraints problemaaticas" (Expand Search), "complementar constraints problemasaticas" (Expand Search), "complementar constraints problematica" (Expand Search), "complementar constraints problematic" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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