Perhaps you should try some spelling variations:
"der software development community practices." » "der software development common practices.", "der software development communication practices.", "der software development communicative practices.", "adept software development community practices.", "free software development community practices.", "a software development community practices."
"web made development company problems." » "web made development impact problems.", "web trade development company problems.", "web mine development company problems.", "web care development company problems.", "web made development companies problems.", "web made development company profiles.", "web made development complex problems.", "web model development company problems.", "web page development company problems."

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("der software development community practices.") OR ("web made development company problems.")).
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• Adding a wildcard symbol may retrieve word variants: (("der software development community practices.") or ("web made development company problems."))*.