Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat soc » cham soc, chat hoc, chat doc
danh sai » dung sai, danh bat, danh dau
cua viet » ca viet, hoa viet, cua dieu
tu sach » thu sach, su sach, te sach
danh di » danh du, xanh di, danh dien
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
soc va » hoc va, loc va, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. hieu van chat soc va ((danh sai) or (danh di)) ((cua viet) OR (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu van chat soc va ((danh sai) OR (danh di)) ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. hieu van chat soc va ((danh sai) or (danh di)) ((cua viet) OR (cua vat))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu van chat soc va ((danh sai) or (danh di)) ((cua viet) OR (cua vat))*.