Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham tuc » nham thuc, pham thuc, tham thuc
van dang » van dong, van dung, van nang
dang dai » dang hai, dang bai, dang dan
cua viet » ca viet, hoa viet, cua vat
tu cach » tu cac
te sach » toc sach
nang xa » nang x, lang xa, nang ma
tuc van » thuc van, truc van, tuc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky nang xa hoi. hieu van cham tuc van dang dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang xa hoi. hieu van cham tuc van dang dai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang xa hoi. hieu van cham tuc van dang dai cua viet*.