Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
viet cua » viec cua, viet ca, viet qua
vien cac » vien bach, vien dai, vien da
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
lo van » vo van, so van, do van
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: thu sach ty ((lang xa) or (dang xay)) hoi. hieu vien cac ((lo van) OR (le van)) anh viet cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((lang xa) OR (dang xay)) hoi. hieu vien cac ((lo van) OR (le van)) anh viet cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((lang xa) or (dang xay)) hoi. hieu vien cac ((lo van) OR (le van)) anh viet cua te*".