Perhaps you should try some spelling variations:
"diseases drag effect." » "diseases drug effect.", "diseases drugs effect.", "diseases dr effect.", "diseases drag effects.", "diseases dag effect.", "diseases dung effect."
"diseases asr effects." » "diseases ase effects.", "diseases laser effects.", "diseases case effects.", "diseases j.r effects.", "diseases pcr effects."
"disease dna effects." » "disease adnan effects.", "disease diana effects.", "disease data effects.", "disease dna effect.", "disease cla 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: (("disease dna effects.") OR ((("diseases drag effect.") OR ("diseases asr effects."))))~.
• Removing quotes may allow a broader search: (( disease dna effects. ) or ((( diseases drag effect. ) or ( diseases asr effects. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("disease dna effects.") or ((("diseases drag effect.") or ("diseases asr effects."))))*.