Perhaps you should try some spelling variations:
hanh hoi » hanh thoi, hanh noi, hanh hoa
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
hoi cua » hoi chuc
dua ban » dia ban, cua ban, qua ban
duc ban » duc tan, duc van, duc man
van cam » van nam, van lam, van cau
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
su xac » pu xac, su cac
su sac » su sach, su cac

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: ((su sac) OR (su xac)) ky tang xa hoi. hieu van cam ((duc ban) OR (dua ban)) hanh hoi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky tang xa hoi. hieu van cam ((duc ban) OR (dua ban)) hanh hoi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky tang xa hoi. hieu van cam ((duc ban) OR (dua ban)) hanh hoi cua tre*.