Perhaps you should try some spelling variations:
hieu dung » tieu dung, hieu ung, chieu duong
lang van » dang van, tang van, hoang van
thu sach » thuat sach, thuoc sach, thu hoach
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
duoc va » nuoc va, duc va, duoc ma
va duoc » vat duoc, va cuoc, va doc
tu sach » su sach, te sach, tu cach
lang xa » lang ha, dang xay
cua chu » sua chua
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) ty ((lang xa) OR (lang van)) hoi. hieu dung va duoc va tinh va cua chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty ((lang xa) OR (lang van)) hoi. hieu dung va duoc va tinh va cua chu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ty ((lang xa) OR (lang van)) hoi. hieu dung va duoc va tinh va cua chu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty ((lang xa) OR (lang van)) hoi. hieu dung va duoc va tinh va cua chu*.