Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
toc sach » hoc sach, doc sach, thuoc sach
thi van » thi lan, thi hanh, thi nang
mua ban » cua ban, qua ban
nam mua » nam cua, nam qua, nam xua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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) or (toc sach)) ty nang xa hoi. ((thien van) OR (thi van)) nam mua ban thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang xa hoi. ((thien van) OR (thi van)) nam mua ban thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ty nang xa hoi. ((thien van) OR (thi van)) nam mua ban thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ty nang xa hoi. ((thien van) OR (thi van)) nam mua ban thanh vi cua tre*.