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
hanh dai » hanh tai, hanh dao, vanh dai
cua viet » ca viet, hoa viet, cua vat
vu sach » vu bach, vu khach
su sach » so sach
va hanh » van hanh, va thanh, va danh
soc va » hoc va, loc va, doc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (su sach)) ky nang x hoi. hieu van chat soc va hanh dai cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) ky nang x hoi. hieu van chat soc va hanh dai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) ky nang x hoi. hieu van chat soc va hanh dai cua viet*.