Perhaps you should try some spelling variations:
hieu vu » hieu va, hieu ve, hieu su
va hanh » van hanh, va thanh, va danh
sang ky » sang kyo, dang ky, tang ky
dai hoi » dai hoc, dai hai
dai moi » doi moi
vi cua » vai cua, di cua
xuc va » duc va, tuc va, luc va
vu cam » vu cham, vu cao, va cam
cua te » cua tu
dan ky » van ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((dan ky) OR (sang ky)) sang ((dai hoi) OR (dai moi)). hieu vu cam xuc va hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((dan ky) or (sang ky)) sang ((dai hoi) OR (dai moi)). hieu vu cam xuc va hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: tu ((dan ky) or (sang ky)) sang ((dai hoi) OR (dai moi)). hieu vu cam xuc va hanh vi cua te*.