Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lap » thanh san, phan lap, thanh hai
cham duc » pham duc, cham soc, pham duy
tu cach » tu cac
cua tre » cuu tre, cua triet, dua tren
duc ban » duc tan, duc van, dua ban
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cach tu » cach thuc
tay hoi » tay ho, tay thai
tao hoi » tao khoi, tao boi, thao hoc
tu sang » thu sang, tu san, tu lang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach tu sang ((tao hoi) or (tay hoi)). hieu ve cham duc ban thanh lap ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu sang ((tao hoi) OR (tay hoi)). hieu ve cham duc ban thanh lap ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu cach tu sang ((tao hoi) or (tay hoi)). hieu ve cham duc ban thanh lap ((cua tre) or (cua te))*.