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 dai » danh dau, danh di, danh sai
cua viet » ca viet, cua vat, cua dieu
te sach » toc sach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
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: ((te sach) or (su sach)) ky nang xa hoi. hieu van chat soc va danh dai ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (su sach)) ky nang xa hoi. hieu van chat soc va danh dai ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (su sach)) ky nang xa hoi. hieu van chat soc va danh dai ((cua viet) or (hoa viet))*.