Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty hang, ly nang
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua
ma hoi » mai hoi, xa hoi, ma hoa

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 (thuoc sach)) ((ty nang) or (ty xang)) ma hoi. hieu van cham tuc va danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) ((ty nang) OR (ty xang)) ma hoi. hieu van cham tuc va danh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ((ty nang) or (ty xang)) ma hoi. hieu van cham tuc va danh di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) ((ty nang) or (ty xang)) ma hoi. hieu van cham tuc va danh di cua tre*.