Perhaps you should try some spelling variations:
deal housing » dual housing, federal housing, rental housing
real housing » rental housing, rural housing, dual housing
tested using » test using, tests using, testing using
than china » tuan china, han china, wuhan china
dong wing » dong ping, dong sin, dong bin
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong wing) or (dong di)) than china ((real housing) OR (deal housing)) tested using six ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong wing) OR (dong di)) than china ((real housing) OR (deal housing)) tested using six ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong wing) or (dong di)) than china ((real housing) OR (deal housing)) tested using six ;*".