Perhaps you should try some spelling variations:
"heat transfers" » "heat transfer", "heat tranfer", "heat transports"
"shear transfer" » "heat transfer", "speaker transfer", "linear transfer"
"head transfer" » "heat transfer", "load transfer", "oecd transfer"

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