Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
theo chu » theo chieu, cho chu, chao chu
luan ung » luan hung, luon ung, luan chung
ung cong » dung cong, luong cong, duong cong
cong van » cong vang, cong san, song van
van phan » van phong, van thanh, luan phan
phan dau » phan tu, hang dau

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 chu)) xanh - sach dung luan ung cong van phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chu)) xanh - sach dung luan ung cong van phan dau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chu)) xanh - sach dung luan ung cong van phan dau*.