Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
tang tai » hang tai, dung tai, sang tao
tu cach » tu cac
cam tuc » cam xuc, cam tu, dam thuc
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
tai co » mai co, tai so, tri co
vi cua » vai cua, di 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 cach) or (thu sach)) ky tang tai co. hieu ve ((cam tuc) or (nam thuc)) va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thu sach)) ky tang tai co. hieu ve ((cam tuc) OR (nam thuc)) va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thu sach)) ky tang tai co. hieu ve ((cam tuc) or (nam thuc)) va hanh vi cua tre*.