Perhaps you should try some spelling variations:
van chat » cao chat
hieu van » hieu va, thien van, lieu va
cua viet » hoa viet, cua vat, cua dieu
dinh dai » dinh dat, sinh dai, dinh dao
chat soc » cham soc, chat hoc, chat doc
va dinh » van dinh, va kinh, va tinh
tu sach » thu sach, su sach, tu cach
nang xa » nang x, lang xa, nang ma
te sach » toc sach
ca viet » va viet, co viet, hoa viet
soc va » hoc va, loc va, doc va
y nang » ky nang, ly nang, v nang

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) OR (te sach)) y nang xa hoi. hieu van chat soc va dinh dai ((cua viet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang xa hoi. hieu van chat soc va dinh dai ((cua viet) OR (ca viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) y nang xa hoi. hieu van chat soc va dinh dai ((cua viet) or (ca viet))*".