Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
trung tuan » trung thanh, trung tam, tran tuan
tuan nhan » xuan nhan, luan nhan, tan nhan
trong dan » trong dang, trong san, trong tan
doc hieu » toc thieu, hoc thieu, hoc hien
tong dan » tuong dan, thong dan, cong 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) or (theo chieu)) xanh - thanh trung tuan nhan ((tong dan) OR (trong dan)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chieu)) xanh - thanh trung tuan nhan ((tong dan) OR (trong dan)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo chieu)) xanh - thanh trung tuan nhan ((tong dan) OR (trong dan)) than cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chieu)) xanh - thanh trung tuan nhan ((tong dan) OR (trong dan)) than cau*.