Perhaps you should try some spelling variations:
sang dai » sang tai, lang dai, sang mai
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 phat » su pham, tu phat, xu phat
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
xuc va » tuc va, xac va
luc va » tuc va, loc va
vi cua » vai cua, di cua
cua te » cua tu

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 san ky sang dai hoi. hieu su phat ((((xuc va) OR (luc va))) OR (duc va)) hanh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: tu san ky sang dai hoi. hieu su phat ((((xuc va) or (luc va))) or (duc va)) hanh vi cua te*.