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 dogs effective."
"diseases drugs effectss." » "disease drugs effectss.", "disease drug effectss.", "diseases dogs effectss.", "diseases drugs effects.", "diseases drug effects.", "diseases drugs affect."
"diseases drug effectors." » "diseases drug effects.", "diseases drugs effects.", "diseases rug effects."

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