Perhaps you should try some spelling variations:
"diseases drugs effectss." » "diseases drug effectss.", "disease drugs effectss.", "diseases dogs effectss.", "diseases drugs effects.", "diseases drug effects.", "diseases drugs effective."
"disease drug effectss." » "disease drug effects.", "disease drug effectors.", "disease drugs effects.", "diseases drug effectss."
"diseases drag effect." » "diseases drug effect.", "diseases dr effect.", "diseases dna effect.", "diseases drag effects.", "diseases dag effect.", "diseases dung 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 ("disease drug effectss."))) or ("diseases drag effect."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("diseases drugs effectss.") OR ("disease drug effectss."))) OR ("diseases drag effect."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"diseases drugs effectss.\") OR (\"disease drug effectss.\"))) or (\"diseases drag effect.\"))*".
• Removing quotes may allow a broader search: (((( diseases drugs effectss. ) OR ( disease drug effectss. ))) or ( diseases drag effect. ))*.