Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ve cham » ve chat, vu cham, ve chim
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu

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. hieu ((ve cham) OR (va cham)) duc ((va hanh) or (gia thanh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. hieu ((ve cham) OR (va cham)) duc ((va hanh) OR (gia thanh)) di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang xa hoi. hieu ((ve cham) OR (va cham)) duc ((va hanh) or (gia thanh)) di cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. hieu ((ve cham) OR (va cham)) duc ((va hanh) or (gia thanh)) di cuu tre*.