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