Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
so sanh » do sanh
te sach » toc sach
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
va cua » va chua, via cua, ca cua
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: ((so sanh) or (te sach)) ky nang o hoi. hieu van nam ((xuc van) or (duc van)) hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (te sach)) ky nang o hoi. hieu van nam ((xuc van) OR (duc van)) hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (te sach)) ky nang o hoi. hieu van nam ((xuc van) or (duc van)) hanh va cua tre*.