Perhaps you should try some spelling variations:
van khanh » van thanh, van hanh, van anh
van nhanh » van thanh, van hanh, van nhan
cham tuc » nham thuc, pham thuc, tham thuc
ca viet » va viet, co viet, hoa viet
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
su xac » pu xac, su cac
cay ca » cay co
su sac » su sach, su cac
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: ((su sac) or (su xac)) ky nang x hoi. hieu ve cham tuc ((van nhanh) OR (van khanh)) cay ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky nang x hoi. hieu ve cham tuc ((van nhanh) OR (van khanh)) cay ca viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky nang x hoi. hieu ve cham tuc ((van nhanh) OR (van khanh)) cay ca viet*".