Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hien thanh » hien hanh, tien thanh, dien thanh
ban thanh » ban hanh, ban hang
thanh cac » hanh cac, thanh bac, thanh ca
cua lang » cua dang, cua hang, cua mang
cua dong » chua dong, cua cong, cua dang
cong ban » cong bang, cong san, cong tan

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 thanh) or (thien thanh)) - canh tranh ((cua lang) or (cua dong)) cong ban thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien thanh) OR (thien thanh)) - canh tranh ((cua lang) OR (cua dong)) cong ban thanh cac.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien thanh) or (thien thanh)) - canh tranh ((cua lang) or (cua dong)) cong ban thanh cac*.