Perhaps you should try some spelling variations:
past mass » past pasts, past case, past has
mass chen » mass when
yang yang » wang yang, wang yan
dang hari » dang hai
chen wei » zhen wei, chen e
wei shen » kwei sheng, enwei shen, wei shang
yang jie » yang jin, yang jui, yang yi
yang xi » yang yi, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: past mass chen wei shen ((((((yang yang) or (yang jie))) or (yang xi))) or (yang di)) dang hari ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: past mass chen wei shen ((((((yang yang) OR (yang jie))) OR (yang xi))) OR (yang di)) dang hari ;*.