Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
cau treo » cau theo, cau tren, cau triet
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
sach v » sach va, sach 2, sach vay
dan va » dan ca, ban va, han va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach y)) nang xa hoi. hieu vu cham duc va ((dan va) OR (doan va)) cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach y)) nang xa hoi. hieu vu cham duc va ((dan va) OR (doan va)) cau treo~".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach y)) nang xa hoi. hieu vu cham duc va ((dan va) OR (doan va)) cau treo*.