Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thanh di » thanh doi, thanh de, thanh do
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
co sach » bo sach, cuon sach, hoc sach
song xa » song cua
nong xa » dong xa, nong va, cong xay
ve chat » va chat, van chat
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach tu ((nong xa) OR (song xa)) hoi. hieu ve chat ((xuc va) or (luc va)) thanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach tu ((nong xa) OR (song xa)) hoi. hieu ve chat ((xuc va) OR (luc va)) thanh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach tu ((nong xa) OR (song xa)) hoi. hieu ve chat ((xuc va) or (luc va)) thanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: co sach tu ((nong xa) OR (song xa)) hoi. hieu ve chat ((xuc va) or (luc va)) thanh di cua viet*.