Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
trung tuan » trung thanh, trung tam, tran tuan
cong thanh » dong thanh, cong trinh, cong tan
trung cua » truong cua, trung cap, dung cua
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu nganh - thanh ((trung cua) OR (trung tuan)) thong ((cong dan) or (cong thanh)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - thanh ((trung cua) OR (trung tuan)) thong ((cong dan) OR (cong thanh)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - thanh ((trung cua) OR (trung tuan)) thong ((cong dan) or (cong thanh)) than cau".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - thanh ((trung cua) OR (trung tuan)) thong ((cong dan) or (cong thanh)) than cau*.