Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
trung cay » trung cap, trong cay, rung cay
ban thanh » ban hanh, ban hang
thanh cau » thanh chau, thanh mau, nhanh cau
cong ban » cong bang, cong san, cong tan
he dieu » hoc dieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((he dieu) or (theo chieu)) hanh - thanh trung cay trong cong ban thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((he dieu) OR (theo chieu)) hanh - thanh trung cay trong cong ban thanh cau.
• Adding a wildcard symbol may retrieve word variants: ((he dieu) or (theo chieu)) hanh - thanh trung cay trong cong ban thanh cau*.