Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (su sach)) y nang xa hoi. hieu van cham soc ((van hanh) OR (ban hanh)) vai cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (su sach)) y nang xa hoi. hieu van cham soc ((van hanh) OR (ban hanh)) vai cua viet~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (su sach)) y nang xa hoi. hieu van cham soc ((van hanh) OR (ban hanh)) vai cua viet*.