Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
ky trung » ky trong, ki trung, ly trung
trung ha » trung hoc, trung tam, trung cap
hieu van » hieu va, thien van, hieu ve
duoc ban » duc ban, quoc ban, buoc ban
thanh di » thanh doi, thanh de, thanh do
da duoc » tao duoc, hoa duoc
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
di cuu » di cau, di cua, dinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky trung ha hoi. ((hieu van) or (lieu va)) da duoc ban thanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky trung ha hoi. ((hieu van) OR (lieu va)) da duoc ban thanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky trung ha hoi. ((hieu van) or (lieu va)) da duoc ban thanh di cuu tre*.