Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hang cong » dang cong, hang nong, bang cong
cong van » cong vang, cong san, song van
van phat » va phat, van chat, van phan
cong va » dong va, cong ha, cong tac
va hang » van hang, va nang, va lang
phat tu » phan tu, pham tu, phap tu

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