Perhaps you should try some spelling variations:
nhanh mang » nhanh lang, hanh mang, nhanh quang
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tung » thanh tung, manh tung, thanh trung
hanh dung » thanh dung, anh dung, hanh dong
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan ban » van 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: theo tieu xanh - ((((hanh tung) OR (hanh dung))) OR (nhanh mang)) cua tong cong bai toan ban~.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((((hanh tung) or (hanh dung))) or (nhanh mang)) cua tong cong bai toan ban*.