Perhaps you should try some spelling variations:
"diseases davis effective." » "diseases drugs effective.", "diseases laws effective.", "diseases tactics effective.", "diseases david effective.", "disease david effective.", "diseases dalit effective."
"diseases dogs effectss." » "diseases drugs effectss.", "diseases do effectss.", "diseases down effectss.", "diseases dogs effect.", "diseases logs effects.", "diseases drugs effects."
"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 davis effective.") OR ("diseases dogs effectss."))) OR ("diseases drug effect."))~.
• Removing quotes may allow a broader search: (((( diseases davis effective. ) or ( diseases dogs effectss. ))) or ( diseases drug effect. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("diseases davis effective.") or ("diseases dogs effectss."))) or ("diseases drug effect."))*.