Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va dan » ca dan, va dao, va dau

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 sang ma hoi. ((hieu ve) or (lieu va)) cac xuc ((va hanh) or (va dan)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ma hoi. ((hieu ve) OR (lieu va)) cac xuc ((va hanh) OR (va dan)) hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ma hoi. ((hieu ve) or (lieu va)) cac xuc ((va hanh) or (va dan)) hai cua tre*.