Perhaps you should try some spelling variations:
benh viem » benh vien, benh ve
toc sach » hoc sach, doc sach, thuoc sach
cam quoc » cac quoc, cao quoc, nam quoc
viem cua » viec cua, diem cua, nhiem cua
lang van » dang van, tang van, hoang van
hieu van » thien van, lieu va, hieu ve
lang xa » lang ha, dang xay
bo benh » so benh, o benh, ba benh
hieu va » lieu va, hieu qua
quoc bo » quoc bao, nuoc bo, quoc co
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y ((lang xa) or (lang van)) hoi. ((hieu van) OR (hieu va)) cam quoc bo benh viem cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((lang xa) OR (lang van)) hoi. ((hieu van) OR (hieu va)) cam quoc bo benh viem cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((lang xa) or (lang van)) hoi. ((hieu van) OR (hieu va)) cam quoc bo benh viem cua te*".