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, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, x ho

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 x 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 x hoi. hieu van nam ((xuc van) OR (duc van)) hanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) or (te sach)) ky nang x 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 x hoi. hieu van nam ((xuc van) OR (duc van)) hanh va cua tre*.