Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
chat nuoc » nhat nuoc, khat nuoc, thoat nuoc
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
cua tu » cua tuc, cua su, cua cu

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 ty ((lang xa) OR (dang xay)) hoi. hieu va chat nuoc va ((tich va) OR (trinh vat)) cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((lang xa) OR (dang xay)) hoi. hieu va chat nuoc va ((tich va) or (trinh vat)) cua tu~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((lang xa) OR (dang xay)) hoi. hieu va chat nuoc va ((tich va) or (trinh vat)) cua tu*.