Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
duc ban » duc tan, duc van, duc man
dua ban » dia ban, cua ban, qua ban
y nang » ky nang, ly nang, v nang
ve dao » de dao, va dao, ve bao
cua te » cua tu

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 y nang x ho. hieu ve 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 y nang x ho. hieu ve dao ((duc ban) OR (dua ban)) thanh vai ((cua triet) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang x ho. hieu ve dao ((duc ban) or (dua ban)) thanh vai ((cua triet) or (cua te))*.