Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh vai » hanh vi, hanh va, hanh tai
chat xuc » chat huu, cam xuc, chao xu
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
va chat » van chat, va phat, cao chat
tu sach » su sach, te sach, tu cach
nang ma » tang ma, sang ma, mang may
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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)) ky ((nang ma) OR (nang cao)) hoi. hieu va chat xuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky ((nang ma) OR (nang cao)) hoi. hieu va chat xuc va hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky ((nang ma) OR (nang cao)) hoi. hieu va chat xuc va hanh vai cua tre*".