Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thanh tung » thanh cong
dang cong » dung cong
cua dang » cua cong, cua ban
cong van » cong vang, cong san, song van
van vat » van chat, nhan vat
vat ban » van ban, va ban, vat ran

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

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