Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
van tham » van thanh, van tuan, van chat
danh dai » danh dau, danh di, danh sai
nang ma » tang ma, sang ma, nang cao
va tham » va cham, va thanh, va thuat
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa

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