Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
nam thuoc » nam thu, nha thuoc, cay thuoc
nam thuc » am thuc, nam thu, nam tu
va thanh » gia thanh, ban thanh, va tinh
lang van » dang van, tang van, hoang van
vu sach » vu bach, su sach, vu khach
doi cua » dai cua, hoi cua
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay
cua tuc » cua duc, cua tu, cua thuoc

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