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