Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
hang tai » hang va, dung tai
thuc va » thuc vat, thuc dan, thuc day
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
sach ky » sach ty, sach kem, sach hay
tai hai » thi hai, dai hai, tai ha
sac ky » cac ky, sai ky
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
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 ky) or (sach y))) or (sac ky)) hang tai hai. hieu vu cham thuc va dan vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sach ky) OR (sach y))) OR (sac ky)) hang tai hai. hieu vu cham thuc va dan vi cua te.
• Adding a wildcard symbol may retrieve word variants: su ((((sach ky) or (sach y))) or (sac ky)) hang tai hai. hieu vu cham thuc va dan vi cua te*.