Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
trung chua » trung cua, trong chuan, trung ha
chua nang » chuc nang, chua xang, kha nang
khoan cam » khoa cam, khoan va, phan cam
ho chieu » theo chieu, hoc thieu, doi chieu
cong ban » cong bang, cong tan, cong dan
cong tac » cong ty

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

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