Perhaps you should try some spelling variations:
"transplantation of organs, tissus" » "transplantation of organs, tissues", "transplantation of organs, tissue"
"transplantation of organs, issus" » "transplantation of organs, issues", "transplantation of organs, issue"
"transplantation of organs, tissue" » "transplantation of organs, issue"

Try widening your search to All Fields.

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: (((("transplantation of organs, tissus") OR ("transplantation of organs, issus"))) OR ("transplantation of organs, tissue")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"transplantation of organs, tissus\") OR (\"transplantation of organs, issus\"))) or (\"transplantation of organs, tissue\"))".
• Removing quotes may allow a broader search: (((( transplantation of organs, tissus ) OR ( transplantation of organs, issus ))) or ( transplantation of organs, tissue )).
• Adding a wildcard symbol may retrieve word variants: (((("transplantation of organs, tissus") OR ("transplantation of organs, issus"))) or ("transplantation of organs, tissue"))*.