Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
hieu nganh » vien nganh, hiem ngan, hieu manh
trung cua » truong cua, trung tuan, trung cap
doc hieu » toc thieu, hoc thieu, hoc hien
tung cua » tuong cua, dung cua, tang cua
cong tan » cong tac, cong san, cong thanh
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac

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: doc hieu nganh - thanh ((tung cua) OR (trung cua)) phuong cong tan ((than cap) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - thanh ((tung cua) OR (trung cua)) phuong cong tan ((than cap) or (khan cap))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - thanh ((tung cua) OR (trung cua)) phuong cong tan ((than cap) or (khan cap))*.