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
vu sach » su sach, vu khach
doi cua » dai cua, hoi cua
cua duc » cua tuc, cua nuoc, cua quoc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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 (vu bach)) ky lang xa hoi. hieu va ((nam thuc) or (nam thuoc)) va thanh doi cua duc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) ky lang xa hoi. hieu va ((nam thuc) OR (nam thuoc)) va thanh doi cua duc.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu bach)) ky lang xa hoi. hieu va ((nam thuc) or (nam thuoc)) va thanh doi cua duc*.