Perhaps you should try some spelling variations:
ky dang » ky nang, ky danh
xay hoi » tay hoi, cay phoi, gay thoi
tai cua » thai cua, tai cuc, tri cua
dan tai » van tai, dan thi, han tai
va dan » ca dan, va dao, va dau
te sac » te sach, te cac, te san
va cai » va cac, va bai, va dai
sac ky » cac ky, sai ky
cua su » qua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang ((xay hoi) or (xa hoi)). hieu ((va cai) or (cao chat)) duc va dan tai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang ((xay hoi) OR (xa hoi)). hieu ((va cai) OR (cao chat)) duc va dan tai cua su.
• Adding a wildcard symbol may retrieve word variants: te sac ky dang ((xay hoi) or (xa hoi)). hieu ((va cai) or (cao chat)) duc va dan tai cua su*.