Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tham tuc » tham thuc, thai tuc, nham thuc
thi van » thi lan, thi hanh, thi nang
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
nang xa » nang x, lang xa, nang ma
dau cuu » dau cua, dau cuoi
cuu tre » cua tre, cau tren, cau treo

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