Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
thanh dung » thanh duong, thanh hung, hanh dung
thanh tung » thanh cong
luan chung » luan chinh
chung cong » nhung cong, chong cong, phung cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cong san » cong tac
than cao » toan cao, thai cao, than sao
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: hoc thiet tach - ((thanh dung) or (thanh tung)) luan chung cong san ((than cao) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - ((thanh dung) OR (thanh tung)) luan chung cong san ((than cao) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - ((thanh dung) or (thanh tung)) luan chung cong san ((than cao) or (than cap))*.