Perhaps you should try some spelling variations:
thang cong » thanh cong, thang long, thong cong
doi chieu » doc hieu, doi chi, mot chieu
cong chuc » cong thuc, cong cu, cong cua
chuc hang » chuc nang, chuc hanh, phuc hang
hang cong » dang cong, hang nong, bang cong
cong nang » cong ngang, cong lang, cong nong
nang phan » nang phat, nang thanh, nang quan

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 chuc hang cong nang phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thang cong chuc hang cong nang phan tu*.