Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cam » van nam, van lam, van cau
cuc ban » cua ban, cac ban, duc ban
cuu ban » cuu van, cua ban, cuu san
tu sac » tu sach, tu san, tu bac
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky nang x hoi. hieu van cam ((cuc ban) OR (cuu ban)) hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu cac)) ky nang x hoi. hieu van cam ((cuc ban) OR (cuu ban)) hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu cac)) ky nang x hoi. hieu van cam ((cuc ban) OR (cuu ban)) hanh vi cua te*.