Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh do » thanh de, thanh pho, thanh hoa
nuoc ban » nuoc san, quoc ban, buoc ban
cap nuoc » dat nuoc
mai khoi » mai khoa, tai khoa, cac khoi
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
hai ky » thai ky, hoi ky, hai ly
ve cap » ve cac, le cap, ve cai
ma hoi » mai hoi, xa hoi, me hoi
do cua » doi cua, co cua, de cua
vu hai » su hai, vu ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu hai ky nang ((((ma hoi) or (mai khoi))) or (ma hoa)). hieu ve cap nuoc ban thanh do cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu hai ky nang ((((ma hoi) OR (mai khoi))) OR (ma hoa)). hieu ve cap nuoc ban thanh do cua tre.
• Adding a wildcard symbol may retrieve word variants: vu hai ky nang ((((ma hoi) or (mai khoi))) or (ma hoa)). hieu ve cap nuoc ban thanh do cua tre*.