Perhaps you should try some spelling variations:
sang dai » sang tai, lang dai, sang mai
thu san » thuy san, thu ban, phu san
ky sang » ky nang, ky dang, ky tang
dai hoi » dai hoc, dai hai, dai moi
hieu su » hieu sau, tieu su, hieu so
su chat » su phat, du chat, so chat
hanh va » hang va, hanh vi
luc va » duc va, loc va
va cua » va chua, via cua, ca cua
xuc va » duc va, xac va
tuc va » thuc va, truc va, tuc xa
san ky » sang ky, van ky, dan ky
cua tu » cua tuc, cua su, cua cu

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 sang dai hoi. hieu su chat ((((xuc va) or (tuc va))) or (luc va)) hanh va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky sang dai hoi. hieu su chat ((((xuc va) OR (tuc va))) OR (luc va)) hanh va cua tu.
• Adding a wildcard symbol may retrieve word variants: thu san ky sang dai hoi. hieu su chat ((((xuc va) or (tuc va))) or (luc va)) hanh va cua tu*.