Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh dung » thanh dung, anh dung, hanh dong
tong cong » trong cong, cong cong, dung cong
van thanh » ban thanh, van tuan
dung cua » dung luan, dung cho
cua tong » cua cong, cua dong, cua nong
tap toan » tap doan, tap quan, bai toan

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: hoc ((chieu xanh) OR (chieu tinh)) - hanh dung cua tong cong ((van thanh) OR (tap toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu tinh)) - hanh dung cua tong cong ((van thanh) or (tap toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu tinh)) - hanh dung cua tong cong ((van thanh) or (tap toan)) cau*.