Perhaps you should try some spelling variations:
va tuyen » va truyen, tac tuyen, ke tuyen
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
hoc sac » hoc sach, hoc cac, hoc mac
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
sac ky » cac ky, sai ky
cua te » cua tu
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sac ky nang ((mai hoi) or (lai hoi)). hieu ve cac duc va danh vi ((cua te) or (va tuyen))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky nang ((mai hoi) OR (lai hoi)). hieu ve cac duc va danh vi ((cua te) OR (va tuyen)).
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang ((mai hoi) or (lai hoi)). hieu ve cac duc va danh vi ((cua te) or (va tuyen))*.