Perhaps you should try some spelling variations:
hung cong » nhung cong, hung cuong, phung cong
theo kha » theo phap, thao khoa, theo chu
kha nang » phap nang, ky nang, ki nang
tung cam » trung cap, tung pham, duong cam
dung cam » dung lam, dung cac, dung nam
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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 ((tung cam) OR (dung cam)) hung cong dan ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo kha nang - thanh ((tung cam) OR (dung cam)) hung cong dan ((toan cau) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo kha nang - thanh ((tung cam) OR (dung cam)) hung cong dan ((toan cau) or (toan cao))*.