Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
dong cong » duong cong, dung cong, dang cong
tung tac » tuong tac, ung tac, trung tam
tac dong » tac dung, tac trong, ha dong
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - thanh tung tac dong cong ((tap toan) or (tan tran)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - thanh tung tac dong cong ((tap toan) OR (tan tran)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh tung tac dong cong ((tap toan) or (tan tran)) cau*.