Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van bac » van ban, van hac, dan bac
van bao » van ban, van dao
vai cua » dai cua, hai cua, lai cua
bo van » vo van, so van, do van
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. hieu ((van bac) or (van bao)) bo van thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. hieu ((van bac) OR (van bao)) bo van thanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. hieu ((van bac) or (van bao)) bo van thanh vai cua triet*.