Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung khoa » truong khoa, trung hoa, rung khoa
hieu lang » chieu sang, hieu quang, nhieu tang
khoa dung » hoc dung, khoa cong
cong ban » cong bang, cong tan, cong dan
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu tinh) or (hieu lang)) - thanh trung khoa dung ((cong ban) OR (cong san)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu tinh) OR (hieu lang)) - thanh trung khoa dung ((cong ban) OR (cong san)) phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tinh) or (hieu lang)) - thanh trung khoa dung ((cong ban) OR (cong san)) phan tu".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tinh) or (hieu lang)) - thanh trung khoa dung ((cong ban) OR (cong san)) phan tu*.