Perhaps you should try some spelling variations:
"heat transfers" » "heat transfer", "heat transports", "legal transfers"
"head transfer" » "heat transfer", "shear transfer", "load transfer"
"heat tranfer" » "heat transfer", "bioheat transfer", "heat trace"

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: (("head transfer") OR ((("heat transfers") OR ("heat tranfer")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"head transfer\") or (((\"heat transfers\") OR (\"heat tranfer\"))))".
• Removing quotes may allow a broader search: (( head transfer ) or ((( heat transfers ) OR ( heat tranfer )))).
• Adding a wildcard symbol may retrieve word variants: (("head transfer") or ((("heat transfers") OR ("heat tranfer"))))*.