Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
thanh trung » thanh tung
thien anh » thien danh, tien anh, thien thanh
tam trong » nam trong, lam trong, pham trong
cong san » cong tac
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.

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