Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
hieu cach » hieu cac, chieu sach, hieu ca
trung cua » truong cua, trung cap, dung cua
hang cong » dang cong, bang cong, thanh cong
hang nong » thang long, han tong
hoc hieu » hoc thieu, hoc hien, doc hieu
dan can » dan chan, dan canh, dan ca
can cau » van cau, ban cau, ca cau

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: hoc hieu cach - thanh ((trung cua) OR (trung tuan)) ((hang cong) OR (hang nong)) dan can cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu cach - thanh ((trung cua) OR (trung tuan)) ((hang cong) or (hang nong)) dan can cau~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - thanh ((trung cua) OR (trung tuan)) ((hang cong) or (hang nong)) dan can cau*.