Perhaps you should try some spelling variations:
van than » van thanh, van thang, van tuan
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
than luc » nhan luc, than duc, thanh luu
vai cua » dai cua, hai cua, lai cua
va hanh » va thanh, va danh, ban hanh
te sach » toc sach
vu nang » vuc nang, va nang, vu dang
v nang » va nang, van nang, voi nang
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: te sach ((v nang) OR (vu nang)) xa hoi. hieu van than luc ((va hanh) or (van hanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (vu nang)) xa hoi. hieu van than luc ((va hanh) OR (van hanh)) vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v nang) OR (vu nang)) xa hoi. hieu van than luc ((va hanh) or (van hanh)) vai cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) OR (vu nang)) xa hoi. hieu van than luc ((va hanh) or (van hanh)) vai cua te*.