Perhaps you should try some spelling variations:
boom during » blooms during, books during, boost during
cost during » boost during, crust during, west during
risk hong » risk among, risk along, risk how
wing ran » wing ian, wing tan, wing sun
ran ying » fan ying, tan ying, jin ying
ying end » big end
hong shu » cong shu, tong shui, wong shiu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wing ran ying end ((cost during) OR (boom during)) risk hong shu ;~.
• Adding a wildcard symbol may retrieve word variants: wing ran ying end ((cost during) or (boom during)) risk hong shu ;*.