Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
dong cong » duong cong, dung cong, dang cong
hach toan » thanh toan, manh toan
trung co » trung bo, trong co, truong cao
tac toan » tap toan, tam toan, tich toan
co dong » o dong, cong dong, lao dong

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 sang) or (chieu sach)) - thanh trung co dong cong ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - thanh trung co dong cong ((tac toan) OR (hach toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - thanh trung co dong cong ((tac toan) or (hach toan)) cau*.