Perhaps you should try some spelling variations:
"diseases drugs effective." » "diseases groups effective.", "diseases drugs affecting.", "diseases davis effective.", "disease drugs effective.", "disease drug effective.", "diseases douglas effective."
"diseases drug effectss." » "diseases drug effects.", "diseases drug effectors.", "diseases drugs effects."
"diseases dogs effect." » "diseases do effect.", "diseases down effect.", "diseases douglas effect."

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