Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
dung cong » dung trong
ban quan » van quan
cong san » cong tac
san tran » tan tran, ban tran, dang tran
tran cao » toan cao, tran chau, trang cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - canh ((ban cua) or (ban quan)) dung cong san tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - canh ((ban cua) OR (ban quan)) dung cong san tran cao*.