Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
thanh trung » thanh tung
hien quang » dien quang, bien quang, hien quan
cua thuong » cua truong, cua phuong, ca thuong
bien quan » bien quang, lien quan, vien quan
trung cua » truong cua, trung tuan, trung cap
cong tac » cong ty
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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: hoc ((hien quang) OR (bien quan)) - thanh trung cua thuong cong tac ((than cau) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien quang) or (bien quan)) - thanh trung cua thuong cong tac ((than cau) OR (phan cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien quang) or (bien quan)) - thanh trung cua thuong cong tac ((than cau) OR (phan cau))*.