Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, lam thuoc
duoc ban » duc ban, quoc ban, buoc ban
thai cua » tai cuc, tri cua, dai cua
than cua » nhan cua, ban cua, gian cua
nang ma » tang ma, sang ma, nang cao
van lam » van nam
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky nang ma hoi. hieu van lam duoc ban thanh ((thai cua) or (than cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang ma hoi. hieu van lam duoc ban thanh ((thai cua) OR (than cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu can ky nang ma hoi. hieu van lam duoc ban thanh ((thai cua) or (than cua)) tre*.