Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
than cua » nhan cua, thai cua, ban cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
o lai » o lao

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 o lai. hieu ve cam ((xuc van) or (duc tan)) hanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o lai. hieu ve cam ((xuc van) OR (duc tan)) hanh than cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o lai. hieu ve cam ((xuc van) or (duc tan)) hanh than cua tre*.