Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
cua tre » cua te, cuu tre, cua triet
cac xuc » cac nuoc, chat xuc, cac cuoc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ca cua » co 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 nang ma hoi. hieu va ((cac xuc) or (cam xuc)) ((va danh) OR (va dinh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu va ((cac xuc) OR (cam xuc)) ((va danh) OR (va dinh)) ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. hieu va ((cac xuc) or (cam xuc)) ((va danh) OR (va dinh)) ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu va ((cac xuc) or (cam xuc)) ((va danh) OR (va dinh)) ca cua tre*.