Perhaps you should try some spelling variations:
"diseases drug effectss." » "diseases drug effects.", "diseases drug effectors.", "diseases drugs effects."
"diseases drag effects." » "diseases drugs effects.", "diseases dr effects.", "diseases dna effects.", "diseases drug effects.", "diseases xdrug effects.", "diseases rug effects.", "diseases dag effects.", "diseases dung effects.", "diseases drying effects."
"diseases drag effect." » "diseases drugs effect.", "diseases dr effect.", "diseases dna effect.", "diseases dag effect.", "diseases dung effect.", "diseases drying effect."

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 drug effectss.") or ((("diseases drag effects.") OR ("diseases drag effect."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("diseases drug effectss.") OR ((("diseases drag effects.") OR ("diseases drag effect.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"diseases drug effectss.\") or (((\"diseases drag effects.\") OR (\"diseases drag effect.\"))))".
• Removing quotes may allow a broader search: (( diseases drug effectss. ) or ((( diseases drag effects. ) OR ( diseases drag effect. )))).
• Adding a wildcard symbol may retrieve word variants: (("diseases drug effectss.") or ((("diseases drag effects.") OR ("diseases drag effect."))))*.