Perhaps you should try some spelling variations:
dong hoang » hong hong
wang yang » wang yan, wang liang, wang yanling
dann hari » dann hat, dann war
dong bin » dong sin, dong di, dann bin
test how » west how, tested how, lost how
bin dann » sein dann, bin da, ein dank
ya a » a a, y a, ye a

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wang yang) OR (dong hoang))) OR (dong bin)) ya a ((test how) OR (trust how)) bin dann hari ;~".
• Adding a wildcard symbol may retrieve word variants: ((((wang yang) OR (dong hoang))) OR (dong bin)) ya a ((test how) OR (trust how)) bin dann hari ;*.