Perhaps you should try some spelling variations:
thien van » thi van
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, dang xay
cua van » cua ban, cua vat, cua dan
tuan vi » luan vi, quans vi, tuan tai
quan vi » quan li, quan tri, quan doi
cua tre » cua te, cuu tre, cua triet
ang xa » lang xa, mang xa, dang xay

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