Perhaps you should try some spelling variations:
sach kem » hanh kem
tam thuc » tham thuc, am thuc, nam thuc
sang tai » hang tai, sang tao, tang tai
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
tai hai » thi hai, dai hai, tai ha
ve tam » ve tac, ve tai, va tam
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 tam thuc va danh 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 tam thuc va danh vi cua te.
• Adding a wildcard symbol may retrieve word variants: su ((sach kem) or (sac ky)) sang tai hai. hieu ve tam thuc va danh vi cua te*.