Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
thu san » thuy san, thu ban, phu san
hanh va » hang va, hanh vi
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
hoa hoi » khoa hoi, hoa doi, hoc hoi
san ky » sang ky, van ky, dan ky
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ky lang ((hoa hoi) or (hoa hoc)). lieu va cam xuc ban ((hanh vai) OR (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky lang ((hoa hoi) OR (hoa hoc)). lieu va cam xuc ban ((hanh vai) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu san ky lang ((hoa hoi) or (hoa hoc)). lieu va cam xuc ban ((hanh vai) OR (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu san ky lang ((hoa hoi) or (hoa hoc)). lieu va cam xuc ban ((hanh vai) OR (hanh va)) cua tre*.