Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
sang tao » hang tai
hieu ve » hieu va, hieu van
doan vi » doan va, don vi, doan thi
va doan » va doanh, van doan, va dan
thuc va » thuc vat, thuc dan, thuc day
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, cua triet
tao hoi » tao khoi, tao boi, tay hoi
sac ky » cac ky
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sai ky)) sang tao hoi. hieu ve cham thuc va doan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) sang tao hoi. hieu ve cham thuc va doan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sai ky)) sang tao hoi. hieu ve cham thuc va doan vi cua tre*.