Perhaps you should try some spelling variations:
"smaller newton wissenschaft" » "smaller news wissenschaft", "smaller fiktion wissenschaft", "smaller von wissenschaft", "matter newton wissenschaft"
"smaller non wissenschaft" » "smaller von wissenschaft", "smaller kann wissenschaft", "smaller finden wissenschaft", "small non wissenschaft", "smaller than wissenschaft", "smaller ones wissenschaft"

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"smaller newton wissenschaft\") OR (\"smaller non wissenschaft\"))".
• Removing quotes may allow a broader search: (( smaller newton wissenschaft ) OR ( smaller non wissenschaft )).
• Adding a wildcard symbol may retrieve word variants: (("smaller newton wissenschaft") OR ("smaller non wissenschaft"))*.