Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
lang van » dang van, tang van, hoang van
thanh vi » hanh vi, thanh va, thanh ve
cham duc » pham duc, cham soc, pham duy
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay
tu cai » tu cac, tu can, tu bai
vi cua » vai cua, di cua
tu sai » tu bai, tu san, tu 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 sai) OR (tu cai)) ky ((lang xa) or (lang van)) hoi. hieu ve cham duc van thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu cai)) ky ((lang xa) OR (lang van)) hoi. hieu ve cham duc van thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu cai)) ky ((lang xa) or (lang van)) hoi. hieu ve cham duc van thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu cai)) ky ((lang xa) or (lang van)) hoi. hieu ve cham duc van thanh vi cua tre*.