Perhaps you should try some spelling variations:
"wireless dry fbg sensors" » "wireless days fbg sensors", "wireless ds fbg sensors", "wireless d2d fbg sensors"
"wireless dry eeg sensors" » "wireless days eeg sensors", "wireless ds eeg sensors", "wireless d2d eeg sensors", "wireless dry eyes sensors"

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"wireless dry fbg sensors\") OR (\"wireless dry eeg sensors\"))".
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