Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
than daun » than bau, than daem, than data
can data » can tata, dan data, fan data
yang jin » yang jie, yang jun, shang jin
ying jin » jing ji, yang jie
how hai » how has, how ai, how hci

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