Perhaps you should try some spelling variations:
tieng trung » truong trung
phan cong » thanh cong
van tieng » van tien, va tieng, ban tieng
trung van » truong van, trong van, trung va
doc hieu » hoc thieu, hoc hien
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) sach - phan cong van tieng trung van than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sach - phan cong van tieng trung van than cap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sach - phan cong van tieng trung van than cap*.