Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
toc sach » hoc sach, doc sach, thuoc sach
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
va danh » va dinh, va dan, va hanh
lai cua » dai cua, hai cua, thai cua
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, 5 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 ky nang ((x hoi) or (x ho)). lieu va cham tuc va danh ((lai cua) OR (lai chau)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((x hoi) OR (x ho)). lieu va cham tuc va danh ((lai cua) OR (lai chau)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ((x hoi) or (x ho)). lieu va cham tuc va danh ((lai cua) OR (lai chau)) triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ((x hoi) or (x ho)). lieu va cham tuc va danh ((lai cua) OR (lai chau)) triet*.