Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
cua dang » cua cong, cua ban
cong san » cong tac
thai cac » thoai cac, tai cac, khai 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 thien hach - anh dung cua dang ((cong dong) or (cong san)) thai cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - anh dung cua dang ((cong dong) OR (cong san)) thai cac.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - anh dung cua dang ((cong dong) or (cong san)) thai cac*.