Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va kinh » va tinh, qua kinh
va dinh » van dinh, va tinh, vu dinh
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
hieu va » hieu qua
ky tang » ky nang, ky dang, kho tang
co cua » con cua, ca cua, cong cua

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 ky tang xa hoi. ((hieu va) or (lieu va)) cam xuc ((va dinh) OR (va kinh)) co cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. ((hieu va) OR (lieu va)) cam xuc ((va dinh) OR (va kinh)) co cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang xa hoi. ((hieu va) or (lieu va)) cam xuc ((va dinh) OR (va kinh)) co cua tre*".