Perhaps you should try some spelling variations:
thien chanh » thien chinh, hien hanh, tien thanh
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
tuan tong » toan tong, thuan trong, toan thong
tong cong » trong cong, cong cong, dung cong
thanh cac » hanh cac, thanh bac, thanh ca
cong ban » cong bang, cong san, cong tan
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien chanh) or (thien thanh)) - thanh trung tuan tong cong ban ((than cau) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien chanh) OR (thien thanh)) - thanh trung tuan tong cong ban ((than cau) OR (thanh cac)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thien chanh) or (thien thanh)) - thanh trung tuan tong cong ban ((than cau) or (thanh cac))*.