Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
ve thanh » le thanh, de thanh, den thanh
dang xay » dang van, van xay
cham cuu » cap cuu, chat cua
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
cuu ve » cuu va

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 ty ((lang xa) OR (dang xay)) hoi. hieu qua cham cuu ve thanh ((vai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((lang xa) OR (dang xay)) hoi. hieu qua cham cuu ve thanh ((vai cua) OR (hai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((lang xa) OR (dang xay)) hoi. hieu qua cham cuu ve thanh ((vai cua) or (hai cua)) tre*".