Perhaps you should try some spelling variations:
tham soc » cham soc, tham nuoc, thai son
dang xay » dang van, van xay
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
lang xa » lang ha, lang van
soc va » hoc va, loc va, doc va
vi cua » di cua
te cao » te bao

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 cao ky ((lang xa) OR (dang xay)) hoi. hieu va tham soc va hanh ((vi cua) OR (vai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cao ky ((lang xa) OR (dang xay)) hoi. hieu va tham soc va hanh ((vi cua) or (vai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: te cao ky ((lang xa) OR (dang xay)) hoi. hieu va tham soc va hanh ((vi cua) or (vai cua)) tre*.