Perhaps you should try some spelling variations:
thanh sinh » thanh binh, thanh tinh, thanh vinh
ban thanh » ban hanh, ban hang
sinh cua » manh cua, dinh cuu, sinh va
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham do » cham o, pham do, tham do
cua tre » cua te, cuu tre, cua triet
do ban » doi ban, co ban, do ben
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang ((o hai) or (x ho)). hieu ve cham do ban thanh sinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((o hai) OR (x ho)). hieu ve cham do ban thanh sinh cua tre.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((o hai) or (x ho)). hieu ve cham do ban thanh sinh cua tre*.