Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
tham soc » cham soc, tham nuoc, thai son
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
lang xa » lang ha, dang xay
cua tre » cuu tre, cua triet, dua tren
va tham » van tham, va cham, va thanh
te cac » tu cac, ve cac, te cao
soc va » hoc va, loc va, doc va
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky ((lang xa) OR (lang van)) hoi. hieu va tham soc va hanh vi ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky ((lang xa) OR (lang van)) hoi. hieu va tham soc va hanh vi ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te cac ky ((lang xa) OR (lang van)) hoi. hieu va tham soc va hanh vi ((cua tre) or (cua te))*.