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