Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
lang van » dang van, tang van, hoang van
dang xay » dang van, van xay
te sach » toc sach
doi cua » dai cua, hoi cua
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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 y ((lang van) or (dang xay)) hoi. hieu va cac ((xuc va) OR (tuc va)) thanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((lang van) OR (dang xay)) hoi. hieu va cac ((xuc va) OR (tuc va)) thanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((lang van) or (dang xay)) hoi. hieu va cac ((xuc va) OR (tuc va)) thanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((lang van) or (dang xay)) hoi. hieu va cac ((xuc va) OR (tuc va)) thanh doi cua tre*.