Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh ve » hanh ve, thanh va, thanh vien
lang van » dang van, tang van, hoang van
te sach » toc sach
soc van » hoc van, oc van, sac van
va chat » van chat, va phat, hoa chat
luu tre » luu tru, cuu tre, luy tre
ve luu » ke luu, vi luu

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 ((mang may) or (lang van)) hoi. hieu ((va chat) OR (cao chat)) soc van thanh ve luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((mang may) OR (lang van)) hoi. hieu ((va chat) OR (cao chat)) soc van thanh ve luu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((mang may) or (lang van)) hoi. hieu ((va chat) OR (cao chat)) soc van thanh ve luu tre*".