Perhaps you should try some spelling variations:
thanh trung » thanh tung
cao thuong » cao truong, ca thuong, cho thuong
thong than » thong thanh, thong phan, thong nhan
trung cao » truong cao, trung cap, trung co
thong tan » thong tran, thong tin, thong van
chi xanh » chi anh, chi danh, chi hanh
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - thanh trung cao thuong ((thong tan) or (thong than)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - thanh trung cao thuong ((thong tan) OR (thong than)) van ban.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - thanh trung cao thuong ((thong tan) or (thong than)) van ban*.