Perhaps you should try some spelling variations:
"wireless dry fbg sensors" » "wireless days fbg sensors", "wireless ds fbg sensors", "wireless die fbg sensors", "wireless dry eeg sensors"
"wireless d2d fbg sensors" » "wireless ad fbg sensors", "wireless 2 fbg sensors", "wireless ds fbg sensors", "wireless d2d eeg 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 d2d fbg sensors\"))".
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