Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
lang mai » lang dai, lang hai, lang man
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
xuc van » duc van, luc van, xuc ban
ve cham » va cham, ve chat, vu cham
mai hoi » mai khoi, dai hoi, lai hoi
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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 (thuat sach)) ky lang mai hoi. hieu ((ve cham) or (ve cac)) xuc van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky lang mai hoi. hieu ((ve cham) OR (ve cac)) xuc van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky lang mai hoi. hieu ((ve cham) or (ve cac)) xuc van hanh vai cua tre*.