Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
bang thanh » ban thanh, dang thanh, tang thanh
trung cua » truong cua, trung tuan, trung cap
bang than » ban than, sang than, bang nhan
ho chieu » theo chieu, hoc thieu, doi chieu
ban cong » bang cong, van cong, phan cong

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 cua ban cong ((bang than) OR (bang thanh)) cau~.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh trung cua ban cong ((bang than) or (bang thanh)) cau*.