Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thanh de » thanh ve, thanh do, thanh le
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
lam duc » lam duoc, pham duc, nam duoc
hanh de » hanh ve, hanh kem
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. ((thien van) or (thi van)) lam duc va ((thanh de) OR (hanh de)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. ((thien van) OR (thi van)) lam duc va ((thanh de) OR (hanh de)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. ((thien van) or (thi van)) lam duc va ((thanh de) OR (hanh de)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. ((thien van) or (thi van)) lam duc va ((thanh de) OR (hanh de)) cuu tre*.