Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va thanh » gia thanh, ban thanh, va tinh
dai hai » dai han, dai hoi, dai tai
hieu ve » hieu va, hieu van
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
su sai » su tai, su hai, su dai
sai ky » sac ky
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky nang ((dai hoc) or (dai hai)). hieu ve cac nuoc va thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang ((dai hoc) OR (dai hai)). hieu ve cac nuoc va thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sai ky nang ((dai hoc) or (dai hai)). hieu ve cac nuoc va thanh hai cua tre*.