Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung cua » truong cua, trung tuan, trung cap
ho chieu » theo chieu, hoc thieu, doi chieu
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
phan cau » phan dau, phan cac, phan lap

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