Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van cham » van chat, van tham, van pham
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang xa hoi. thi ((van cham) OR (va cham)) tuc ((va dinh) or (va tinh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. thi ((van cham) OR (va cham)) tuc ((va dinh) OR (va tinh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang xa hoi. thi ((van cham) OR (va cham)) tuc ((va dinh) or (va tinh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. thi ((van cham) OR (va cham)) tuc ((va dinh) or (va tinh)) dai cua tre*.