Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
tang van » dang van, hoang van, trong van
thu sai » thu hai, thu tai, thu san
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
tang ha » lang ha, tang ma, trung ha
cua tre » cua te, cuu tre, cua triet
sai ky » sac ky
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sai ky ((tang ha) or (tang van)) noi. hieu vu cham soc ((ban thanh) or (ban hanh)) va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sai ky ((tang ha) OR (tang van)) noi. hieu vu cham soc ((ban thanh) OR (ban hanh)) va cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sai ky ((tang ha) or (tang van)) noi. hieu vu cham soc ((ban thanh) or (ban hanh)) va cua tre*.