Perhaps you should try some spelling variations:
nuoc luan » luc luan
tay quang » tac quang, tai quang, tao quang
lam nuoc » lam duoc, lam ngoc, lam nguoi
hieu van » hieu va, thien van, lieu va
benh va » benh dai, benh tai
benh ve » benh vien, benh viem
te sach » toc sach
van lam » van nam
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang

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) or (tay quang)) xa hoi. hieu van lam nuoc luan ((benh ve) OR (benh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y lang) OR (tay quang)) xa hoi. hieu van lam nuoc luan ((benh ve) OR (benh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y lang) or (tay quang)) xa hoi. hieu van lam nuoc luan ((benh ve) OR (benh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) or (tay quang)) xa hoi. hieu van lam nuoc luan ((benh ve) OR (benh va)) cua tre*.