Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
so sach » so sanh, bo sach, co sach
cac mac » cay mac, cac bac, cac mau
van xa » van ha, dan xa, tan xa
ca dan » cac dan, ca dao
cua te » cua tu
cua cu » cua chu, cua cau, cua su

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: so sach y ((van xa) OR (van xay)) hoi. hieu vien cac mac ca dan ca ((cua te) OR (cua cu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((van xa) OR (van xay)) hoi. hieu vien cac mac ca dan ca ((cua te) or (cua cu))~".
• Adding a wildcard symbol may retrieve word variants: so sach y ((van xa) OR (van xay)) hoi. hieu vien cac mac ca dan ca ((cua te) or (cua cu))*.