Perhaps you should try some spelling variations:
sang tao » hang tai
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
van dinh » van minh, van dich, va dinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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 tao hoi. hieu ve cam xuc ((((ban hanh) or (van hanh))) or (van dinh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang tao hoi. hieu ve cam xuc ((((ban hanh) OR (van hanh))) OR (van dinh)) dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang tao hoi. hieu ve cam xuc ((((ban hanh) or (van hanh))) or (van dinh)) dai cua tre*.