Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
trung tuan » trung thanh, trung tam, tran tuan
nhung hong » nhung chong, nhung huong, nhung phong
trung cua » truong cua, trung cap, dung cua
doc hieu » toc thieu, hoc thieu, hoc hien
hong van » hoang van, thong van, phong van
tuan cau » toan cau, tuan cu, thuan cam
quan cau » quang cao, toan cau, quan ha

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 ((trung cua) OR (trung tuan)) nhung hong van ((tuan cau) OR (quan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - thanh ((trung cua) OR (trung tuan)) nhung hong van ((tuan cau) or (quan cau))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - thanh ((trung cua) OR (trung tuan)) nhung hong van ((tuan cau) or (quan cau))*.