Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
trung cua » truong cua, trung tuan, trung cap
dang cong » dung cong
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (theo chieu)) tinh - thanh trung cua dang cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (theo chieu)) tinh - thanh trung cua dang cong tan tran tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (theo chieu)) tinh - thanh trung cua dang cong tan tran tap*.