Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
sang tai » hang tai, sang tao, tang tai
sach kem » hanh kem
tai hai » thi hai, dai hai, tai ha
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach kem) or (sac ky)) sang tai hai. hieu ve tham thuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach kem) OR (sac ky)) sang tai hai. hieu ve tham thuc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: su ((sach kem) or (sac ky)) sang tai hai. hieu ve tham thuc va hanh vi cua te*.