Perhaps you should try some spelling variations:
khoai chau » khoa chau, khoa phau, hai chau
nhung cong » thong cong, hang cong, nhung don
thanh toan » thanh hoa, thanh san, tinh toan
manh tung » manh hung, thanh tung
dung cong » dung trong
toan ban » van ban
tung ha » trung ha, dung ha, tung ho
ho chu » hoi chu, cho chu, ho chua

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: ((khoai chau) OR (ho chu)) tinh - manh tung ha ((nhung cong) OR (dung cong)) thanh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((khoai chau) or (ho chu)) tinh - manh tung ha ((nhung cong) OR (dung cong)) thanh toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((khoai chau) or (ho chu)) tinh - manh tung ha ((nhung cong) OR (dung cong)) thanh toan ban*.