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

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

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