Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
sinh y » sinh ly
ca cua » co cua
va cua » va chua, via cua, ma cua
y lang » o lang, _ lang, tay lang

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: hoc sinh y lang xa hoi. ((hieu ve) OR (hieu va)) cam duc van thanh ((va cua) OR (ca cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh y lang xa hoi. ((hieu ve) OR (hieu va)) cam duc van thanh ((va cua) or (ca cua)) te~".
• Adding a wildcard symbol may retrieve word variants: hoc sinh y lang xa hoi. ((hieu ve) OR (hieu va)) cam duc van thanh ((va cua) or (ca cua)) te*.