Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thai cua » tai cuc, tri cua, dai cua
hieu van » thien van, lieu va, hieu ve
than cua » nhan cua, ban cua, gian cua
lam duoc » nam duoc, luat duoc, lam thuoc
duoc ban » duc ban, quoc ban, buoc ban
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky

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

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