Perhaps you should try some spelling variations:
cong thuoc » cong thuc, dong thuoc, long thuoc
thuoc dung » hoc dung, thuy dung
doi chieu » doc hieu, doi chi, mot chieu
dung cong » dung trong
cong van » cong vang, cong san, song van
van phan » van phong, van thanh, luan phan
phan cac » nhan cach, phan dau, phan lap

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 cong thuoc dung cong van phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thanh cong thuoc dung cong van phan cac.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sach - thanh cong thuoc dung cong van phan cac*.