Perhaps you should try some spelling variations:
nhanh nang » nhanh lang, nhanh mang, nhanh quang
quan trong » gian trong
doi chieu » doc hieu, doi chi, mot chieu
nang quan » ban quan, nang suat
trong hat » trong hoat, trong phat, trong nhat
van khan » van khanh, van khang, van phan
khan cap » khan ap, than cap, khoan cam
hat van » hoat van, ha van, hai 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 - nhanh nang quan trong hat van khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - nhanh nang quan trong hat van khan cap.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sach - nhanh nang quan trong hat van khan cap*.