Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
ban than » ban thanh, van thanh, ban hanh
ban hang » ngan hang

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: doi chieu sang - thanh trung cua dung cong ((tinh toan) OR (((ban than) OR (ban hang)))) cau~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung cua dung cong ((tinh toan) or (((ban than) or (ban hang)))) cau*.