Perhaps you should try some spelling variations:
parallel complementary » parallel elementary, barter complementary, care complementary
complementary problem » complementarity problem, complementarity problems, complementary roles
function dysfunction » function function, nations dysfunction, erectile dysfunction
dysfunction https » function https, dysfunction after, dysfunction james
problem function » problems function, problems functions, problem functional

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• Performing a fuzzy search may retrieve terms with similar spellings: parallel complementary problem function dysfunction https~.
• Adding a wildcard symbol may retrieve word variants: parallel complementary problem function dysfunction https*.