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
trung tuan » trung thanh, trung tam, tran tuan
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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)) - thanh trung tuan dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (thien chanh)) - thanh trung tuan dung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) or (thien chanh)) - thanh trung tuan dung cong tan toan cau*.