Perhaps you should try some spelling variations:
van hanh » van thanh, van ban, van minh
ban hanh » ban hang
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
van anh » van thanh, tuan anh, van minh
sach vu » sach va, sach tu, sach uu
cau luc » cau truc, cau phuc
hieu va » lieu va, hieu qua
vu nang » vuc nang, va nang, vu dang
va cau » van cau, va cac, va dau
cua su » qua su
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 vu nang x hoi. hieu va cau luc ((((van hanh) OR (van anh))) or (ban hanh)) vai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu nang x hoi. hieu va cau luc ((((van hanh) OR (van anh))) OR (ban hanh)) vai cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vu nang x hoi. hieu va cau luc ((((van hanh) OR (van anh))) or (ban hanh)) vai cua su".
• Adding a wildcard symbol may retrieve word variants: te sach vu nang x hoi. hieu va cau luc ((((van hanh) OR (van anh))) or (ban hanh)) vai cua su*.