Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh dung » thanh duong, thanh tung, thanh hung
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh dung » anh dung, hanh dong, manh dung
tong cong » trong cong, cong cong, dung cong
van thanh » ban thanh, van tuan
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 - ((hanh dung) OR (thanh 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 - ((hanh dung) OR (thanh dung)) cua tong cong ((van thanh) or (tap toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - ((hanh dung) OR (thanh dung)) cua tong cong ((van thanh) or (tap toan)) cau*.