Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
vu khac » vu kham, vu khanh, bui khac
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
soc van » hoc van, oc van, sac van
y nang » ly nang, v nang, may nang
vi cua » vai cua, di cua

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: ((tu sach) OR (vu khac)) ((y nang) OR (ky nang)) xa hoi. hieu ve cham soc van hanh vi cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (vu khac)) ((y nang) OR (ky nang)) xa hoi. hieu ve cham soc van hanh vi cua viet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu khac)) ((y nang) OR (ky nang)) xa hoi. hieu ve cham soc van hanh vi cua viet*.