Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
dang xay » dang van, van xay
su sach » so sach, vu sach
lang xa » lang ha, lang van
hieu ve » hieu va, hieu van
dinh tu » danh tu, dinh cu, tinh tu
ve cac » va cac, vien cac
tu cua » hu cua, vu cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu ((lang xa) or (dang xay)) hoi. hieu ve cac ((tuc xa) or (duc va)) dinh tu cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((lang xa) OR (dang xay)) hoi. hieu ve cac ((tuc xa) OR (duc va)) dinh tu cua te.
• Adding a wildcard symbol may retrieve word variants: su sach thu ((lang xa) or (dang xay)) hoi. hieu ve cac ((tuc xa) or (duc va)) dinh tu cua te*.