Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
thuong cong » thong cong, thuong con, thuong dong
hien nhanh » hien hanh, tien thanh, dien thanh
cua thuong » cua truong, cua phuong, ca thuong
thanh chau » thanh cha, thanh cham, thanh chu
trung cua » truong cua, trung tuan, trung cap
thanh cau » thanh mau, nhanh cau, thanh ca
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 nhanh) or (thien thanh)) - thanh trung cua thuong cong ban ((thanh cau) OR (thanh chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (thien thanh)) - thanh trung cua thuong cong ban ((thanh cau) OR (thanh chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) or (thien thanh)) - thanh trung cua thuong cong ban ((thanh cau) OR (thanh chau))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (thien thanh)) - thanh trung cua thuong cong ban ((thanh cau) OR (thanh chau))*.