Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
bai ky » ban ky, sai ky, dai ky
ma hoi » mai hoi, xa hoi, ma hoa
bac ky » cac ky, ban ky, sac ky
ve cam » ve cham, ve cac, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((bai ky) OR (bac ky)) nang ma hoi. hieu ve cam thuc va thanh ve ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((bai ky) or (bac ky)) nang ma hoi. hieu ve cam thuc va thanh ve ((cua tre) OR (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: tu ((bai ky) or (bac ky)) nang ma hoi. hieu ve cam thuc va thanh ve ((cua tre) OR (cuu tre))*.