Perhaps you should try some spelling variations:
phat duc » pham duc, phan duc, phan duoc
hanh vai » hanh vi, hanh va, hanh tai
lai hoi » dai hoi, lai hoa, mai hoi
vai cua » dai cua, hai cua, lai cua
lai roi » loi roi
hieu su » hieu sau, hieu so, hieu suat
ky sang » ky nang, ky dang, ky tang
va hanh » van hanh, va thanh, va danh
tieu su » thieu so
tu van » tu va
cua tu » cua tuc, cua su, cua cu

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 van ky sang ((lai hoi) OR (lai roi)). ((hieu su) OR (tieu su)) phat duc va hanh vai cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu van ky sang ((lai hoi) OR (lai roi)). ((hieu su) or (tieu su)) phat duc va hanh vai cua tu~".
• Adding a wildcard symbol may retrieve word variants: tu van ky sang ((lai hoi) OR (lai roi)). ((hieu su) or (tieu su)) phat duc va hanh vai cua tu*.