Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
y lang » o lang, _ lang, tay lang
cac tu » cac thu, cach tu, cac du
vi cau » ve cau, di cau, viet cau
va cau » van cau, va cac, va dau

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: tu sach y lang xa hoi. ((hieu ve) OR (hieu va)) cac tu va hanh ((vi cau) OR (va cau)) treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. ((hieu ve) OR (hieu va)) cac tu va hanh ((vi cau) or (va cau)) treo~".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. ((hieu ve) OR (hieu va)) cac tu va hanh ((vi cau) or (va cau)) treo*.