Perhaps you should try some spelling variations:
long thanh » luong thanh, long han, long trinh
hong sin » dong sin, hong rina, hong song
six west » six we
six week » six weeks, six we
die west » die welt, die weiss, die werte
ying un » ding und, tying up, ying jin
un long » upon long, van long

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: ((hong sin) OR (wang yan)) ya ((((six west) OR (six week))) OR (die west)) ying un long thanh ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hong sin) or (wang yan)) ya ((((six west) OR (six week))) or (die west)) ying un long thanh ;~".
• Adding a wildcard symbol may retrieve word variants: ((hong sin) or (wang yan)) ya ((((six west) OR (six week))) or (die west)) ying un long thanh ;*.