Perhaps you should try some spelling variations:
sang dai » sang tai, lang dai, sang mai
hieu sau » hieu su, hieu suat, hieu va
ky sang » ky nang, ky dang, ky tang
dai hoi » dai hoc, dai hai, dai moi
tieu su » thieu so
tu sai » tu bai, tu san, tu cai
vi cua » vai cua, di cua
xac va » tac va, ac va, bac va
sai ky » sac ky
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 sai ky sang dai hoi. ((hieu sau) OR (tieu su)) phat ((xac va) OR (duc va)) hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky sang dai hoi. ((hieu sau) OR (tieu su)) phat ((xac va) or (duc va)) hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sai ky sang dai hoi. ((hieu sau) OR (tieu su)) phat ((xac va) or (duc va)) hanh vi cua te*.