Perhaps you should try some spelling variations:
thanh than » thanh thanh, thanh thang, thanh toan
cong khong » cong thong, cong thuong, trong khong
khong phan » thong phan, khong phai, khong phap
doi chieu » doc hieu, doi chi, mot chieu
than cap » khan cap, thanh lap, thanh cac
cap cong » cac cong, cao cong, tap cong
phan van » pham van, thanh van, luan van

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 (toc thieu)) sach - thanh than cap cong khong phan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thanh than cap cong khong phan van ban*.