Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
vat hanh » vat thanh, van hanh, va hanh
cua viet » ca viet, hoa viet, cua vat
so sanh » do sanh
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu van
hieu va » lieu va, hieu qua
sanh y » sinh y, anh y, hanh y
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
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 y nang ma hoi. ((hieu ve) or (hieu va)) cam thuc vat hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y nang ma hoi. ((hieu ve) OR (hieu va)) cam thuc vat hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: so sanh y nang ma hoi. ((hieu ve) or (hieu va)) cam thuc vat hanh vi cua viet*.