Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
cham thuc » nham thuc, pham thuc, tham thuc
toc sach » hoc sach, doc sach, thuoc sach
su triet » su viet, su tien
ve triet » va trien
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
va cham » va chat, va tham
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (nuoc sach)) ky lang ha hoi. hieu va cham thuc va danh di ((su triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (nuoc sach)) ky lang ha hoi. hieu va cham thuc va danh di ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (nuoc sach)) ky lang ha hoi. hieu va cham thuc va danh di ((su triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (nuoc sach)) ky lang ha hoi. hieu va cham thuc va danh di ((su triet) OR (ve triet))*.