Perhaps you should try some spelling variations:
thien danh » thien dang, thien thanh, thien chanh
thien anh » tien anh, thien thanh, thien chanh
tran xuan » tran quang, tran van
dong cong » duong cong, dung cong, dang cong
ban thanh » ban hanh, ban hang
thanh cau » thanh chau, thanh mau, nhanh cau
cong ban » cong bang, cong san, cong tan

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 xuan)) dong cong ban 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 xuan)) dong cong ban thanh cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) or (thien anh)) - hanh ((trung tam) or (tran xuan)) dong cong ban thanh cau*.