Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
shang hai » shang kai, dang hai, chang ha
than bau » than bad, than a, than you
can data » can tata, dan data, fan data
yang jin » yang jie, yang jun, ying jin
song hai » hong hai, dang hai, long han

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 yang yang ((than bau) OR (can data)) yang jin ((song hai) OR (shang hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yang yang ((than bau) or (can data)) yang jin ((song hai) OR (shang hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: dong yang yang ((than bau) or (can data)) yang jin ((song hai) OR (shang hai)) ;*.