Perhaps you should try some spelling variations:
thanh duong » thanh huong, thanh cuong, thanh vuong
duong phan » dung phan, huong phan, muong phan
phan tong » phan trong, phan cong, han tong
tong cong » trong cong, cong cong, dung cong
theo kha » theo phap, thao khoa, theo chu
kha nang » phap nang, ky nang, ki nang
cong san » cong tac
toan tap » toan ban
toan cao » toan 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 kha nang - thanh duong phan tong cong san ((toan tap) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: theo kha nang - thanh duong phan tong cong san ((toan tap) or (toan cao))*.