Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
dinh hoi » dinh moi, dinh toi, dinh hoa
hoi cua » hoi chuc
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach vay
soc va » hoc va, doc va, goc va
loc va » hoc va, luc va
sach 2 » sach y

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach v) or (sach 2)) nang xa hoi. hieu qua cham ((soc va) OR (loc va)) dinh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach 2)) nang xa hoi. hieu qua cham ((soc va) OR (loc va)) dinh hoi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach 2)) nang xa hoi. hieu qua cham ((soc va) OR (loc va)) dinh hoi cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach 2)) nang xa hoi. hieu qua cham ((soc va) OR (loc va)) dinh hoi cua tre*.