Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
dao danh » dao doanh, do danh, dao dan
day danh » day manh, dai danh, day dan
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
hieu ve » hieu van
sai ky » sac ky
de cua » le cua, te cua, dieu cua
vu sai » vu hai, vu san, vu dai
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) OR (dao 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) OR (dao danh)) de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sai ky nang x hoi. ((hieu ve) or (hieu va)) cam thuc ((day danh) OR (dao 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) OR (dao danh)) de cua tre*.