Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
sach thu » sach thue, sach thieu, sach tham
dang van » hoang van
qua cham » qua hai, qua cac, va cham
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thu ((dang van) OR (hang va)) hoi. hieu qua cham thuc va hanh ((hoi cua) or (hoi chuc)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu ((dang van) OR (hang va)) hoi. hieu qua cham thuc va hanh ((hoi cua) OR (hoi chuc)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu ((dang van) OR (hang va)) hoi. hieu qua cham thuc va hanh ((hoi cua) or (hoi chuc)) te".
• Adding a wildcard symbol may retrieve word variants: te sach thu ((dang van) OR (hang va)) hoi. hieu qua cham thuc va hanh ((hoi cua) or (hoi chuc)) te*.