Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu lang » chieu sang, hieu quang, nhieu tang
hoc dang » hoc bang, hoc tang, hoc danh
hoc dung » hoc ung, tac dung, hoc cong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap
ho hieu » ho chieu, hoi hieu, nho hieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh trung ((((hoc dang) OR (hoc dung))) or (hoc dan)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh trung ((((hoc dang) OR (hoc dung))) OR (hoc dan)) cong tac than cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh trung ((((hoc dang) OR (hoc dung))) or (hoc dan)) cong tac than cau*".