Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
cam thuc » am thuc, cam thu, can thuc
nam thuc » am thuc, nam thu, nam tu
cua viet » ca viet, hoa viet, cua vat
so canh » so sanh, bo canh, so danh
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so canh v nang mai khoi. hieu ve ((cam thuc) or (((nam thuc) OR (nam thuoc)))) va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so canh v nang mai khoi. hieu ve ((cam thuc) OR (((nam thuc) OR (nam thuoc)))) va hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so canh v nang mai khoi. hieu ve ((cam thuc) or (((nam thuc) OR (nam thuoc)))) va hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: so canh v nang mai khoi. hieu ve ((cam thuc) or (((nam thuc) OR (nam thuoc)))) va hanh vi cua viet*.