Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, qua cua
doan tap » toan tap, doan cap, doanh tai
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
tap cua » tap quan, tiep cua
va doan » va doanh, van doan, va dan
va cham » va chat, va tham
lang xa » lang ha, lang van
luc va » duc va, tuc va, loc va
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: tu sach y ((lang xa) OR (dang xay)) hoi. hieu ((va cham) or (qua cham)) luc va doan tap cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((lang xa) OR (dang xay)) hoi. hieu ((va cham) OR (qua cham)) luc va doan tap cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((lang xa) OR (dang xay)) hoi. hieu ((va cham) or (qua cham)) luc va doan tap cua te*".