Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
cua viet » ca viet, hoa viet, cua vat
dai hoi » dai hoc, dai hai, dai moi
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
so sanh » do sanh
mai hoi » mai khoi, lai hoi, mai doi
va nang » van nang, da nang, cam nang
v nang » vu nang, van nang, voi 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) OR (va nang)) ((mai hoi) or (dai hoi)). hieu ve cham thuc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ((v nang) OR (va nang)) ((mai hoi) OR (dai hoi)). hieu ve cham thuc va hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ((v nang) OR (va nang)) ((mai hoi) or (dai hoi)). hieu ve cham thuc va hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: so sanh ((v nang) OR (va nang)) ((mai hoi) or (dai hoi)). hieu ve cham thuc va hanh vi cua viet*.