Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
va cham » va chat, va tham
ky dang » ky nang, ky danh
xay hoi » xa hoi, cay phoi, gay thoi
tai cua » thai cua, tai cuc, tri cua
tay hoi » tay ho, tao hoi, tay thai
va hanh » van hanh, va thanh, va danh
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 (tay hoi)). hieu ((va cai) or (va cham)) duc va hanh tai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang ((xay hoi) OR (tay hoi)). hieu ((va cai) OR (va cham)) duc va hanh tai cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky dang ((xay hoi) OR (tay hoi)). hieu ((va cai) or (va cham)) duc va hanh tai cua su".
• Adding a wildcard symbol may retrieve word variants: te sac ky dang ((xay hoi) OR (tay hoi)). hieu ((va cai) or (va cham)) duc va hanh tai cua su*.