Perhaps you should try some spelling variations:
thanh hung » thanh huong, thanh tung, thanh trung
hung pham » nhung pham, nhung phat, dung phan
pham hung » pham hong, pham hang, phan hung
theo kha » theo phap, thao khoa, theo chu
kha nang » phap nang, ky nang, ki nang
cong dan » cong tan, huong dan, cong dong
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 hung pham hung ((cong dan) OR (cong san)) ((toan tap) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo kha nang - thanh hung pham hung ((cong dan) OR (cong san)) ((toan tap) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo kha nang - thanh hung pham hung ((cong dan) OR (cong san)) ((toan tap) or (toan cao))*.