Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
thuc day » thuc dan, thuc vat
day danh » day manh, dai danh, dao danh
hieu ve » hieu van
hieu va » lieu va, hieu qua
danh de » hanh de, dan de, dang de
cua tre » cua te, cuu tre, cua triet
vu sai » vu hai, vu san, vu dai
sai ky » sac ky
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sai ky nang x hoi. ((hieu ve) or (hieu va)) cam thuc day danh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky nang x hoi. ((hieu ve) OR (hieu va)) cam thuc day danh de cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sai ky nang x hoi. ((hieu ve) or (hieu va)) cam thuc day danh de cua tre*.