Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
phong van » phung van, thong van, phong va
toan ban » van ban
cua hai » qua hai, cua dai, cua hoi
tan ban » tang ban, van ban, can ban

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

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