Perhaps you should try some spelling variations:
lam quoc » lam duoc, nam quoc, lam thuoc
hieu van » hieu va, thien van, lieu va
te sach » toc sach
benh ve » benh va, benh vien, benh viem
benh te » benh tre, benh he, benh theo
quoc bo » quoc bao, nuoc bo, quoc co
van lam » van nam
lang ha » long ha
lang xa » dang xay, lang van
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 xa) OR (lang ha)) hoi. hieu van lam quoc bo ((benh te) or (benh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((lang xa) OR (lang ha)) hoi. hieu van lam quoc bo ((benh te) OR (benh ve)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((lang xa) OR (lang ha)) hoi. hieu van lam quoc bo ((benh te) or (benh ve)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((lang xa) OR (lang ha)) hoi. hieu van lam quoc bo ((benh te) or (benh ve)) cua tre*.