Perhaps you should try some spelling variations:
real housing » deal housing, rural housing, dual housing
united using » unwanted using, united mine, tested using
dong ping » dong sin, dong bin, dong jung
han china » hang china, than china, can china
using six » using sex, using sia, using soil
dong di » dong sin

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: ((dong ping) OR (dong di)) han china ((real housing) OR (rental housing)) united using six ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong ping) or (dong di)) han china ((real housing) OR (rental housing)) united using six ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong ping) or (dong di)) han china ((real housing) OR (rental housing)) united using six ;*.