Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo kha » theo phap, thao khoa, theo chu
kha nang » phap nang, ky nang, ki nang
tung nam » trung nam, sung nam, tang nam
dung nam » dong nam, dung lam, sung 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 nam) OR (dung nam)) nhung 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 nam) OR (dung nam)) nhung cong dan ((toan cau) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo kha nang - thanh ((tung nam) OR (dung nam)) nhung cong dan ((toan cau) or (toan cao))*.