Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hanh ve » hanh vi, hanh va, hanh kem
va hanh » van hanh, va thanh, va danh
va chat » van chat, va phat, cao chat
va cham » va tham
lai roi » loi roi
lai hoi » dai hoi, lai hoa, mai hoi
cua tre » cua te, cuu tre, cua triet
loc va » hoc va, luc va
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((lai hoi) OR (lai roi)). hieu ((va cham) or (va chat)) loc va hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((lai hoi) OR (lai roi)). hieu ((va cham) OR (va chat)) loc va hanh ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((lai hoi) OR (lai roi)). hieu ((va cham) or (va chat)) loc va hanh ve cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((lai hoi) OR (lai roi)). hieu ((va cham) or (va chat)) loc va hanh ve cua tre*.