Perhaps you should try some spelling variations:
"tissue bioengineering" » "tissue engineering"
"tissues engineering" » "tissue engineering", "tissue engineered", "wastes engineering"
"_ tissueengineering" » "tissue engineering"
"tissue engeneering" » "tissue engineering", "tissue engineered"

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: (((("tissues engineering") OR ((("tissue engeneering") OR ("_ tissueengineering"))))) OR ("tissue bioengineering")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"tissues engineering\") or (((\"tissue engeneering\") OR (\"_ tissueengineering\"))))) or (\"tissue bioengineering\"))".
• Removing quotes may allow a broader search: (((( tissues engineering ) or ((( tissue engeneering ) OR ( _ tissueengineering ))))) or ( tissue bioengineering )).
• Adding a wildcard symbol may retrieve word variants: (((("tissues engineering") or ((("tissue engeneering") OR ("_ tissueengineering"))))) or ("tissue bioengineering"))*.