Perhaps you should try some spelling variations:
"t-lidar basierte kluftanalyse,structured diagnostic" » "t-lidar basierte kluftanalyse,future diagnostic"
"t-lidar basierte analyse,structured diagnostic" » "t-lidar basierte analyse,future diagnostic", "t-lidar basierten analyse,structured diagnostic", "t-lidar fundierte analyse,structured diagnostic", "t-lidar basierte ansatze,structured diagnostic"
"t-lidar basierte kluftanalyse,structural diagnosis" » "t-lidar basierte kluftanalyse,structural dimensions"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("t-lidar basierte kluftanalyse,structural diagnosis") OR ((("t-lidar basierte kluftanalyse,structured diagnostic") OR ("t-lidar basierte analyse,structured diagnostic")))).
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• Removing quotes may allow a broader search: (( t-lidar basierte kluftanalyse,structural diagnosis ) or ((( t-lidar basierte kluftanalyse,structured diagnostic ) OR ( t-lidar basierte analyse,structured diagnostic )))).
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