Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung cap, dung cua
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
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: ((hoc hieu) or (doc hieu)) nganh - thanh ((trung cua) OR (trung tuan)) thong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (doc hieu)) nganh - thanh ((trung cua) OR (trung tuan)) thong cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (doc hieu)) nganh - thanh ((trung cua) OR (trung tuan)) thong cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (doc hieu)) nganh - thanh ((trung cua) OR (trung tuan)) thong cong dan than cau*.