Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
hoc ban » hoc bang, hoc dan, hoc bai
coc ban » co ban, cac ban, con ban
te sach » toc sach
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
cua te » cua tu
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 ((ly nang) or (ly vang)) x hoi. hieu van cham ((coc ban) OR (hoc ban)) thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly nang) OR (ly vang)) x hoi. hieu van cham ((coc ban) OR (hoc ban)) thanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly nang) or (ly vang)) x hoi. hieu van cham ((coc ban) OR (hoc ban)) thanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ((ly nang) or (ly vang)) x hoi. hieu van cham ((coc ban) OR (hoc ban)) thanh vai cua te*.