Perhaps you should try some spelling variations:
"one narrow transplantation" » "one marrow transplantations", "one eyebrow transplantation", "one national transplantation", "done narrow transplantation", "over narrow transplantation", "fine narrow transplantation"
"bone marrow transplantation" » "bond marrow transplantation"

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: (("bone marrow transplantation") OR ("one narrow transplantation")).
• Removing quotes may allow a broader search: (( bone marrow transplantation ) or ( one narrow transplantation )).
• Adding a wildcard symbol may retrieve word variants: (("bone marrow transplantation") or ("one narrow transplantation"))*.