Perhaps you should try some spelling variations:
thang cong » thanh cong, thang long, thong cong
doi chieu » doc hieu, doi chi, mot chieu
cong thuc » cong tac
cong phap » chong phap, cong phan, cong pham
phap phan » phap phat, phap hoan, phap luan
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 - thang cong thuc dan cong phap phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thang cong thuc dan cong phap phan tu.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sach - thang cong thuc dan cong phap phan tu*.