Perhaps you should try some spelling variations:
nhanh than » nhanh thanh, nhanh thang, nhanh thai
hieu van » hieu va, thien van, lieu va
than cua » nhan cua, thai cua, ban cua
su sach » so sach, vu sach
van cac » van hac, van cau, van bac
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang o hoi. hieu van cac ((xuc van) or (duc van)) nhanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang o hoi. hieu van cac ((xuc van) OR (duc van)) nhanh than cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang o hoi. hieu van cac ((xuc van) or (duc van)) nhanh than cua tre*.