Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
theo dieu » theo tieu, theo chieu, thuoc dieu
anh mang » hanh mang, anh bang, anh nang
anh dang » anh dong, anh dung, anh bang
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo dieu hanh - ((anh mang) or (anh dang)) cua nhung cong bai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo dieu hanh - ((anh mang) OR (anh dang)) cua nhung cong bai toan cao.
• Adding a wildcard symbol may retrieve word variants: theo dieu hanh - ((anh mang) or (anh dang)) cua nhung cong bai toan cao*.