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
nhan tong » nhan trong, nhan thong, nhan tuong
tong dan » tuong dan, thong dan, trong dan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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

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