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

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