Perhaps you should try some spelling variations:
trong nang » trong ngang, trong nong, thong nang
doi chieu » doc hieu, doi chi, mot chieu
nang phat » nang suat, van phat
ho chieu » theo chieu, hoc thieu, mot chieu
dang vat » dong vat, dang nhat, dang viet
dang van » hoang van, hang va
phat cau » phan cau, pha cau, phap cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) sach - nang ((dang vat) OR (dang van)) dung trong nang phat cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - nang ((dang vat) OR (dang van)) dung trong nang phat cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sach - nang ((dang vat) OR (dang van)) dung trong nang phat cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - nang ((dang vat) OR (dang van)) dung trong nang phat cau*.