Perhaps you should try some spelling variations:
"diseases drugugs effectss." » "diseases drugs effectss.", "diseases drug effectss.", "disease drugs effectss.", "diseases drugs effects.", "diseases drug effects.", "diseases dougugs effectss.", "diseases drugugugs effectss.", "diseases _ugugs effectss."
"diseases due effect." » "diseases drug effect.", "diseases diet effect.", "diseases case effect.", "diseases dose effect.", "diseases edge effect.", "diseases age effect."
"diseases dr effect." » "diseases do effect.", "diseases drug effect.", "diseases _ effect.", "diseases gr effect.", "diseases mr effect.", "diseases deer effect."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("diseases drugugs effectss.") or ((("diseases dr effect.") or ("diseases due effect."))))~.
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• Adding a wildcard symbol may retrieve word variants: (("diseases drugugs effectss.") or ((("diseases dr effect.") or ("diseases due effect."))))*.