Perhaps you should try some spelling variations:
ve triet » va trien, su triet
den vai » den va, den vay, den vi
sach tu » sach thu, cach tu, sach ty
tu sach » thu sach, su sach, te sach
qua cao » qua cac, qua cai, qua co
nong xa » song xa, dong xa, nong va
tu nong » tu dong, tu cong, tu tong
dan va » doan va, dan ca, ban va
qua ca » qua cac, qua cua, qua cai

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 tu nong xa hoi. hieu ((qua cao) OR (qua ca)) duc va ((den vai) OR (dan va)) ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nong xa hoi. hieu ((qua cao) OR (qua ca)) duc va ((den vai) or (dan va)) ve triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nong xa hoi. hieu ((qua cao) OR (qua ca)) duc va ((den vai) or (dan va)) ve triet*.