Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
dai dang » da dang, dai nang, hai dang
day dang » da dang, day dan, day danh
cac thuc » cac thu, can thuc, cay thuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, 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 ((cac thuc) OR (cach thuc)) ((day dang) or (dai dang)) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky nang x hoi. hieu ve ((cac thuc) OR (cach thuc)) ((day dang) OR (dai dang)) de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sai ky nang x hoi. hieu ve ((cac thuc) OR (cach thuc)) ((day dang) or (dai dang)) de cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sai ky nang x hoi. hieu ve ((cac thuc) OR (cach thuc)) ((day dang) or (dai dang)) de cua tre*.