Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
phong cong » phong chong, thong cong, chong cong
hanh dung » thanh dung, anh dung, manh dung
hanh dong » anh dong, ha dong
cua phong » cua phuong, cua khong, cuu phong
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan tap » toan ban
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((trieu tinh) or (chieu sach)) - ((hanh dung) or (hanh dong)) cua phong cong bai toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((trieu tinh) OR (chieu sach)) - ((hanh dung) OR (hanh dong)) cua phong cong bai toan tap.
• Adding a wildcard symbol may retrieve word variants: theo ((trieu tinh) or (chieu sach)) - ((hanh dung) or (hanh dong)) cua phong cong bai toan tap*.