Perhaps you should try some spelling variations:
hieu sau » hieu su, hieu suat, tieu su
hanh vai » hanh vi, hanh tai, hanh van
sau chat » sat chat, sau chan, soat chat
chat duc » chat xuc, chat doc, chet duoc
ky sang » ky nang, ky dang, ky tang
lai hoi » lai hoa, lai roi, mai hoi
hanh va » hang va, hanh vi
dai hoi » dai hoc, dai hai, dai moi
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban 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 can ky sang ((lai hoi) OR (dai hoi)). hieu sau chat duc va ((hanh vai) OR (hanh va)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky sang ((lai hoi) or (dai hoi)). hieu sau chat duc va ((hanh vai) OR (hanh va)) cua te~".
• Adding a wildcard symbol may retrieve word variants: tu can ky sang ((lai hoi) or (dai hoi)). hieu sau chat duc va ((hanh vai) OR (hanh va)) cua te*.