Perhaps you should try some spelling variations:
ky tang » ky dang, kho tang, ky trong
lai hoi » dai hoi, lai hoa, lai roi
hieu su » hieu sau, tieu su, hieu so
su chat » su phat, du chat, so chat
hanh va » hang va, hanh vi
va cua » va chua, via cua, ca cua
tu sac » tu sach, tu cac, tu san
cuu va » cuu van
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) or (ky tang)) lai hoi. hieu su chat ((cuu va) OR (cuu ve)) hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky nang) OR (ky tang)) lai hoi. hieu su chat ((cuu va) OR (cuu ve)) hanh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky nang) or (ky tang)) lai hoi. hieu su chat ((cuu va) OR (cuu ve)) hanh va cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky nang) or (ky tang)) lai hoi. hieu su chat ((cuu va) OR (cuu ve)) hanh va cua te*.