Perhaps you should try some spelling variations:
dong hoang » hong hong
dong yang » wang yang, yang yang, dan yang
than data » than death, loan data, dan data
can data » can tata, dan data, fan data
yang jin » yang jie, yang jun, ying jin
jin how » john how
how has » how have

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