Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
dinh dat » dinh ket, dinh van, dinh lam
cac phuc » cau phuc, khac phuc, cach thuc
tu sach » su sach, tu cach, vu sach
dat cua » dai cua, day cua, mat cua
vu dinh » quy dinh
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sach) OR (thu sach))) or (te sach)) ky tang xa hoi. hieu ve cac phuc vu dinh dat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thu sach))) OR (te sach)) ky tang xa hoi. hieu ve cac phuc vu dinh dat cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (thu sach))) or (te sach)) ky tang xa hoi. hieu ve cac phuc vu dinh dat cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (thu sach))) or (te sach)) ky tang xa hoi. hieu ve cac phuc vu dinh dat cua tre*.