Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
chat soc » cham soc, chat hoc, chat doc
danh dai » danh dau, danh di, danh sai
cua viet » hoa viet, cua vat, cua dieu
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
ca viet » va viet, co viet, hoa viet
soc va » hoc va, loc va, doc va

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 ky nang xa hoi. ((hieu van) OR (hieu va)) chat soc va danh dai ((cua viet) OR (ca viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((hieu van) OR (hieu va)) chat soc va danh dai ((cua viet) or (ca viet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu van) OR (hieu va)) chat soc va danh dai ((cua viet) or (ca viet))*.