Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thien van » thi van
thanh vi » hanh vi, thanh va, thanh ve
sach thu » sach thue, sach thieu, sach tham
nam xua » nam cua, nam qua, nam luat
nam mua » nam cua, nam qua, nam luat
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
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 ty) OR (sach thu)) nang xa hoi. thien van ((nam mua) or (nam xua)) van thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang xa hoi. thien van ((nam mua) OR (nam xua)) van thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach thu)) nang xa hoi. thien van ((nam mua) or (nam xua)) van thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach thu)) nang xa hoi. thien van ((nam mua) or (nam xua)) van thanh vi cua tre*.