Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hang loi » thang loi, tang loi, thanh loi
hang doi » hang di, huong doi, hang tai
sach tu » sach thu, cach tu, sach ty
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
cuu tre » cua tre, cau tren, cau treo
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tu nang xa hoi. hieu ((va cam) or (va cham)) tu va ((hang doi) OR (hang loi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu nang xa hoi. hieu ((va cam) OR (va cham)) tu va ((hang doi) OR (hang loi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu nang xa hoi. hieu ((va cam) or (va cham)) tu va ((hang doi) OR (hang loi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach tu nang xa hoi. hieu ((va cam) or (va cham)) tu va ((hang doi) OR (hang loi)) cuu tre*.