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
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
hoi cua » hoi chuc
cac tu » cac thu, cach tu, cac du

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

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