Perhaps you should try some spelling variations:
"diseases drugs effectss." » "disease drugs effectss.", "disease drug effectss.", "diseases dogs effectss.", "diseases drugs effects.", "diseases drug effects.", "diseases drugs effective."
"diseases dung effect." » "diseases lung effect.", "diseases during effect.", "diseases young effect.", "diseases lung effects.", "diseases dag effect.", "diseases drag effect."
"diseases drug effect." » "diseases drug effects.", "diseases drag effect.", "diseases drugs effects."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("diseases drugs effectss.") OR ((("diseases drug effect.") OR ("diseases dung effect."))))~.
• Removing quotes may allow a broader search: (( diseases drugs effectss. ) or ((( diseases drug effect. ) or ( diseases dung effect. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("diseases drugs effectss.") or ((("diseases drug effect.") or ("diseases dung effect."))))*.