Perhaps you should try some spelling variations:
thuc thong » thuc trong, thuc khong, thuy thong
thong cong » trong cong, tong cong, thong thong
cong thuc » cong tac
cong phan » cong nhan, cong khan, chong phap
phan phan » phap phan, phan phat, than phan
ho chieu » theo chieu, hoc thieu, mot chieu
phan lap » phan dau

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 (toc thieu)) sach - thanh cong thuc thong cong phan phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (toc thieu)) sach - thanh cong thuc thong cong phan phan lap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (toc thieu)) sach - thanh cong thuc thong cong phan phan lap*.