Perhaps you should try some spelling variations:
van nhanh » van thanh, van hanh, van nhan
nhan thuc » nhan luc, dan thuc, toan thuc
van khanh » van thanh, van hanh, van anh
hieu van » hieu va, thien van, lieu va
hieu ve » hieu va
ca viet » va viet, co viet, hoa viet
su cac » tu cac, su cao, su can
x hoi » xa hoi, o hoi, x ho
li ca » ly ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang x hoi. ((hieu ve) OR (hieu van)) nhan thuc ((van nhanh) or (van khanh)) li ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang x hoi. ((hieu ve) OR (hieu van)) nhan thuc ((van nhanh) OR (van khanh)) li ca viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang x hoi. ((hieu ve) OR (hieu van)) nhan thuc ((van nhanh) or (van khanh)) li ca viet*".