Perhaps you should try some spelling variations:
"diseases drugs effectss." » "diseases drug effectss.", "disease drugs effectss.", "disease drug effectss.", "diseases drugs effects.", "diseases drug effects.", "diseases drugs effective.", "diseases dougs effectss.", "diseases drugugs effectss.", "diseases dueugs effectss."
"diseases deer effect." » "diseases diet effect.", "diseases due effect.", "disease deep effect.", "diseases peer effects.", "diseases kerr effect.", "diseases epr effect."
"diseases dr effect." » "diseases do effect.", "diseases drug effect.", "diseases due effect.", "diseases gr effect.", "diseases mr effect.", "diseases epr effect."

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 dr effect.") OR ("diseases deer effect."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("diseases drugs effectss.") OR ((("diseases dr effect.") OR ("diseases deer effect."))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"diseases drugs effectss.\") or (((\"diseases dr effect.\") OR (\"diseases deer effect.\"))))*".
• Removing quotes may allow a broader search: (( diseases drugs effectss. ) or ((( diseases dr effect. ) OR ( diseases deer effect. ))))*.