Perhaps you should try some spelling variations:
"surface and interface science, thin films" » "surface and surface science, thin films", "surface and interface science, think films", "surface and interface science, than films"
"surface and interface science, gan films" » "surface and surface science, gan films", "surface and interface science, n films", "surface and interface science, tin films", "surface and interface science, aln films"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("surface and interface science, thin films") OR ("surface and interface science, gan films")).
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