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

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y lang xa hoi. ((hieu ve) OR (hieu va)) cam duc van thanh ((va cua) or (va chua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y lang xa hoi. ((hieu ve) OR (hieu va)) cam duc van thanh ((va cua) OR (va chua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y lang xa hoi. ((hieu ve) OR (hieu va)) cam duc van thanh ((va cua) or (va chua)) te".
• Adding a wildcard symbol may retrieve word variants: hoc sach y lang xa hoi. ((hieu ve) OR (hieu va)) cam duc van thanh ((va cua) or (va chua)) te*.