Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thuc va » thuc vat, thuc dan, thuc day
hai cua » thai cua, dai cua, hoi cua
lai cua » dai cua, lai chau, thai cua
va danh » va dinh, va dan, va hanh
do thuc » hoc thuc, dan thuc
sach uu » sach luu, sach tu, sach xu
qua do » qua co, qua da, qua di
x hoi » xa hoi, o hoi, x ho

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 uu) or (sach thu)) nang x hoi. hieu qua do thuc va danh ((lai cua) OR (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach uu) OR (sach thu)) nang x hoi. hieu qua do thuc va danh ((lai cua) OR (hai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach uu) or (sach thu)) nang x hoi. hieu qua do thuc va danh ((lai cua) OR (hai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach uu) or (sach thu)) nang x hoi. hieu qua do thuc va danh ((lai cua) OR (hai cua)) tre*.