Perhaps you should try some spelling variations:
1990 under » 1990 und, 10 under, 1990 der
wang yang » wang yan, wang liang, wang yanling
under one » under age
one small » some small
yang can » yang fan, yang dean, yang yang
can 1990 » von 1990, ab 1990, a 1990
one task » dce task

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang can 1990 under one task ((one saul) or (one small)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang can 1990 under one task ((one saul) OR (one small)) ;.
• Adding a wildcard symbol may retrieve word variants: wang yang can 1990 under one task ((one saul) or (one small)) ;*.