Perhaps you should try some spelling variations:
cong thuoc » cong thuc, dong thuoc, long thuoc
thuoc dang » thuoc dung, thuoc khang, thuc dan
doi chieu » doc hieu, doi chi, mot chieu
dang cong » dung cong
cong lang » cong vang, cong luong, cong quang
lang phan » nang phan, lang thang, lang phong
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 dang cong lang phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thanh cong thuoc dang cong lang phan cac.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sach - thanh cong thuoc dang cong lang phan cac*.