Perhaps you should try some spelling variations:
using reform » housing reform, during reform, housing reforms
union using » union busting, fusion using, union during
reform era » reform a
song seng » hong seung, dong sheng, hong sheng
yang jin » yang jie, yang jun, ying jin
yang jui » yang judy, yang di, yang xi
rent » rents, rest

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: union using reform era (rent OR west) ((yang jin) OR (yang jui)) song seng ;~.
• Adding a wildcard symbol may retrieve word variants: union using reform era (rent or west) ((yang jin) or (yang jui)) song seng ;*.