Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
thanh loi » thanh hoa, thanh hai, thanh lap
cua nuoc » cua quoc, cua nguoi, cua thuoc
nam thuc » am thuc, nam thu, nam tu
va thanh » gia thanh, ban thanh, va tinh
loi cua » loai cua, hoi cua, doi cua
vu sach » vu bach, vu khach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
su sach » so sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (su sach)) ty lang xa hoi. hieu va ((nam thuc) OR (nam thuoc)) va thanh loi cua nuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ty lang xa hoi. hieu va ((nam thuc) OR (nam thuoc)) va thanh loi cua nuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (su sach)) ty lang xa hoi. hieu va ((nam thuc) OR (nam thuoc)) va thanh loi cua nuoc".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ty lang xa hoi. hieu va ((nam thuc) OR (nam thuoc)) va thanh loi cua nuoc*.