Perhaps you should try some spelling variations:
thanh dong » thanh duong, thanh cong, hanh dong
doi chieu » doc hieu, doi chi, mot chieu
dong thuc » dong thuoc, duong thuc, cong thuc
cong nang » cong ngang, cong lang, cong nong
nang phan » nang phat, nang thanh, nang quan
thuc dan » thuc hanh, hoc dan, thuc vat
dan cong » dang cong, van cong, dan dong

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