Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu tinh » trieu tinh, lieu tinh, kieu tinh
chau tinh » cuu tinh, ha tinh, cua tinh
dung lan » dung land, dung lam, dung san
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: doi ((chieu tinh) or (chau tinh)) - anh ((dung lan) or (dung luan)) thuong cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tinh) OR (chau tinh)) - anh ((dung lan) OR (dung luan)) thuong cong tan tran tap.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu tinh) or (chau tinh)) - anh ((dung lan) or (dung luan)) thuong cong tan tran tap*.