Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va thanh » gia thanh, ban thanh, va tinh
trung va » truong va, trang va, trung ha
dang xay » dang van, van xay
te sach » toc sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao

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 ((lang xa) OR (dang xay)) hoi. hieu ((va cam) or (va cao)) trung va thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((lang xa) OR (dang xay)) hoi. hieu ((va cam) OR (va cao)) trung va thanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((lang xa) OR (dang xay)) hoi. hieu ((va cam) or (va cao)) trung va thanh dai cua tre*".