Perhaps you should try some spelling variations:
dong hoang » hong hong
time using » line using
dong ping » dong sin, dong bin, dong jung
west east » west coast
east yang » east young, east long
yang time » long time, yang jie, lag time
using sar » using sat, using svr, using smart

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((dong ping) or (dong hoang)) west east yang time using sar ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((dong ping) OR (dong hoang)) west east yang time using sar ;.
• Adding a wildcard symbol may retrieve word variants: wang ((dong ping) or (dong hoang)) west east yang time using sar ;*.