Perhaps you should try some spelling variations:
nang lai » nang tai, mang lai, nang cai
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
hoc sac » hoc sach, hoc cac, hoc mac
lai hoi » dai hoi, lai hoa, lai roi
van cam » van nam, van lam, van cau
van anh » van thanh, van minh
sac ky » cac ky, sai ky
cua te » cua tu
tuan » quan, tran, luan

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 lai hoi. hieu van cam xuc ((van anh) or (tuan anh)) vi ((cua te) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky nang lai hoi. hieu van cam xuc ((van anh) OR (tuan anh)) vi ((cua te) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang lai hoi. hieu van cam xuc ((van anh) or (tuan anh)) vi ((cua te) or (su triet))*.