Perhaps you should try some spelling variations:
thanh trung » thanh tung
tong thuong » thong thuong, trong thuong, cong thuong
chieu xanh » chieu sach, chieu sang, chieu tinh
thuong han » thuong mai, thuong va, thuong gap
hieu quan » hieu qua, lieu quan, thien quan
trung cua » truong cua, trung tuan, trung cap
cua tong » cua cong, cua dong, cua nong
han than » khan than, phan than, ban than
than cau » toan cau, phan cau, than cap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (hieu quan)) - thanh trung cua tong thuong han than cau~.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (hieu quan)) - thanh trung cua tong thuong han than cau*.