Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thanh di » thanh doi, thanh de, thanh do
hoc ban » hoc bang, hoc dan, hoc bai
loc ban » lo ban, coc ban, hoc bang
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
va dao » ca dao
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ky nang xa hoi. lieu va dao ((loc ban) OR (hoc ban)) thanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang xa hoi. lieu va dao ((loc ban) OR (hoc ban)) thanh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang xa hoi. lieu va dao ((loc ban) OR (hoc ban)) thanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang xa hoi. lieu va dao ((loc ban) OR (hoc ban)) thanh di cua viet*.