Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
vu chat » va chat, ve chat, du chat
dai hoi » dai hoc, dai moi
vai cua » dai cua, hai cua, lai cua
dai hai » dai han, dai tai, dai thao
hieu vu » hieu va, hieu ve, hieu su
luc va » duc va, tuc va, loc va
tu sac » tu sach, tu cac, tu san
xuc va » duc va, tuc va, xac va
sac ky » cac ky, sai 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 sac ky nang ((dai hoi) OR (dai hai)). hieu vu chat ((xuc va) or (luc va)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((dai hoi) OR (dai hai)). hieu vu chat ((xuc va) OR (luc va)) hanh vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((dai hoi) OR (dai hai)). hieu vu chat ((xuc va) or (luc va)) hanh vai cua te*".