Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
thanh doi » thanh loi, thanh moi, thanh do
nam thuc » am thuc, nam thu, nam tu
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach, vu khach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
doi cua » dai cua, hoi cua
cua tu » cua tuc, cua su, cua cu

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