Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hang vai » hang va, hang tai, hang hai
ban hang » ngan hang
vai cua » dai cua, hai cua, lai cua
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi
te cac » tu cac, ve cac, te cao
te sac » te sach, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) OR (te cac)) ky nang ((ma hoi) or (ma hoa)). hieu van cam duc ban hang vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te cac)) ky nang ((ma hoi) OR (ma hoa)). hieu van cam duc ban hang vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te cac)) ky nang ((ma hoi) or (ma hoa)). hieu van cam duc ban hang vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te cac)) ky nang ((ma hoi) or (ma hoa)). hieu van cam duc ban hang vai cua tre*.