Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
thanh trung » thanh tung
thien danh » thien anh, thien dang, thien thanh
thong cong » trong cong, tong cong, thong thong
den thanh » de thanh, dinh thanh, dong thanh
trung ha » trung hoc, trung tam, trung cap
ha thong » hoa thong, nha thong, he thong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, 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 danh) or (thien chanh))) or (den thanh)) - thanh trung ha thong cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thien danh) OR (thien chanh))) OR (den thanh)) - thanh trung ha thong cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thien danh) or (thien chanh))) or (den thanh)) - thanh trung ha thong cong dan than cao*.