Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh luc » thanh luu, than luc, nhan luc
sach vuc » sach duoc, sach nuoc, sach truc
vuc nang » cuc nang, vu nang, chuc nang
hieu van » hieu va, thien van, lieu va
van hanh » ban hanh, van anh, van ban
te sach » toc sach
va hanh » va thanh, va danh, ban hanh
vai cua » hai cua, lai cua, bai cua
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 vuc nang x hoi. hieu van thanh luc ((va hanh) or (van hanh)) ((vai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vuc nang x hoi. hieu van thanh luc ((va hanh) OR (van hanh)) ((vai cua) OR (dai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vuc nang x hoi. hieu van thanh luc ((va hanh) or (van hanh)) ((vai cua) OR (dai cua)) tre*".