Perhaps you should try some spelling variations:
thien danh » thien dang, thien thanh, thien chanh
thien anh » tien anh, thien thanh, thien chanh
tran tuan » tran xuan, tran quang, tran thanh
dong cong » duong cong, dung cong, dang cong
tan thanh » tran thanh, tang thanh, toan thanh
thanh cau » thanh chau, thanh mau, nhanh cau
cong tan » cong tac, cong san, cong thanh

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