Perhaps you should try some spelling variations:
housing crisis » housing census, housing costs
debate housing » adequate housing, debate during, estate housing
jin debate » gain debate, aid debate, un debate
how safety » co safety, how safe, new safety
wang yang » wang yan, wang yanling
do safety » dam safety, bio safety, two safety
ying jin » yang jin, jing ji, yang jie

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: ((wang liang) OR (wang yang)) ying jin debate housing crisis ((how safety) OR (do safety)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang liang) or (wang yang)) ying jin debate housing crisis ((how safety) OR (do safety)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang liang) or (wang yang)) ying jin debate housing crisis ((how safety) OR (do safety)) ;*.