Perhaps you should try some spelling variations:
thanh trung » thanh tung
thi chieu » thi chien, thi hieu, theo chieu
trung cua » truong cua, trung tuan, trung cap
trong van » trong cac
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thi chieu) or (doc hieu)) tinh - thanh trung cua dung trong van ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi chieu) OR (doc hieu)) tinh - thanh trung cua dung trong van ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (doc hieu)) tinh - thanh trung cua dung trong van ((toan cao) or (toan ban))*.