Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien hach » thien thanh
trung tuan » trung thanh, trung tam, tran tuan
hien hanh » dieu hanh
tuan dung » tuan duong, tran dung, tan dung
dong bang » dong san
cong ban » cong bang, cong san, cong tan
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 hach) or (hien hanh)) - thanh trung tuan dung ((cong ban) or (dong bang)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (hien hanh)) - thanh trung tuan dung ((cong ban) OR (dong bang)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (hien hanh)) - thanh trung tuan dung ((cong ban) or (dong bang)) toan cau*.