Perhaps you should try some spelling variations:
thanh chau » thanh cha, thanh cham, thanh chu
tang luan » dung luan
doc hieu » toc thieu, hoc thieu
anh tang » anh bang, anh dang, anh nang
luan ung » luan hung, luon ung, luan chung
ung cong » dung cong, luong cong, duong cong
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) xanh - anh tang luan ung cong san ((thanh chau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) xanh - anh tang luan ung cong san ((thanh chau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) xanh - anh tang luan ung cong san ((thanh chau) or (than cap))*.