Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vai » thanh hai, thanh van, thanh tai
su sach » so sach, vu sach
duc ban » duc tan, duc van, duc man
sach ky » sac ky, sach y, sach ty
dua ban » dia ban, cua ban, qua ban
cua te » cua tu
va dao » ca dao
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang o hoi. lieu va dao ((duc ban) or (dua ban)) thanh vai ((cua triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang o hoi. lieu va dao ((duc ban) OR (dua ban)) thanh vai ((cua triet) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang o hoi. lieu va dao ((duc ban) or (dua ban)) thanh vai ((cua triet) or (cua te))*.