Perhaps you should try some spelling variations:
chat doc » chat hoc, chau doc, thuat doc
sang lai » sang tai, sang lap, mang lai
hanh vai » hanh vi, hanh va, hanh tai
chat duc » chat xuc, chet duoc, pham duc
ky sang » ky nang, ky dang, ky tang
lai hoi » dai hoi, lai hoa, lai roi
hieu su » hieu sau, tieu su, hieu suat
vai cua » dai cua, hai cua, lai cua
hieu so » thieu so
va hanh » van hanh, va thanh, va danh
tu dan » tuc dan, tu ban, cu dan
dan ky » van 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 dan ky sang lai hoi. ((hieu su) OR (hieu so)) ((chat duc) OR (chat doc)) va hanh vai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dan ky sang lai hoi. ((hieu su) or (hieu so)) ((chat duc) OR (chat doc)) va hanh vai cua te~".
• Adding a wildcard symbol may retrieve word variants: tu dan ky sang lai hoi. ((hieu su) or (hieu so)) ((chat duc) OR (chat doc)) va hanh vai cua te*.