Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
lang van » dang van, tang van, hoang van
dang xay » dang van, van xay
va thanh » gia thanh, va tinh, le thanh
te sach » toc sach
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet

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 thanh) OR (ban 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 thanh) OR (ban 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 thanh) OR (ban thanh)) doi cua tre*".