Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nam thuc » nam thuoc, am thuc, nam thu
cam thuc » am thuc, cam thu, can thuc
mai khoi » mai khoa, tai khoa, cac khoi
va hanh » van hanh, va thanh, va danh
so sanh » do sanh
hieu ve » hieu va, hieu van
mai hoi » dai hoi, lai hoi, mai doi
sanh v » sanh va, canh v, sanh _
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 sanh v nang ((mai hoi) OR (mai khoi)). hieu ve ((cam thuc) or (nam thuc)) va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh v nang ((mai hoi) OR (mai khoi)). hieu ve ((cam thuc) OR (nam thuc)) va hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh v nang ((mai hoi) OR (mai khoi)). hieu ve ((cam thuc) or (nam thuc)) va hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: so sanh v nang ((mai hoi) OR (mai khoi)). hieu ve ((cam thuc) or (nam thuc)) va hanh vi cua viet*.