Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
lieu tinh » trieu tinh, diep tinh, bien tinh
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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 ((lieu tinh) OR (chieu sang)) - thanh trung cua dung cong tac ((toan cau) OR (toan tap))~.
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (chieu sang)) - thanh trung cua dung cong tac ((toan cau) or (toan tap))*.