Perhaps you should try some spelling variations:
thien van » thi van
vat thanh » dat thanh, gat thanh, tat thanh
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, tu cach, vu sach
su sach » so sach, vu sach
te sach » toc sach
xang xa » lang xa, mang xa, ang xa
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: ((((tu sach) OR (su sach))) or (te sach)) ty xang xa hoi. thien van nam cua vat thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (su sach))) OR (te sach)) ty xang xa hoi. thien van nam cua vat thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (su sach))) or (te sach)) ty xang xa hoi. thien van nam cua vat thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (su sach))) or (te sach)) ty xang xa hoi. thien van nam cua vat thanh vi cua tre*.