Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, can thuc
cam thu » nam thu, cac thu, ca thu
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
va dinh » van dinh, va kinh, va tinh
di cua » dai cua, doi cua, de cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
cua te » cua tu
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: te sac ky nang x hoi. hieu ve ((cam thuc) or (cam thu)) ((va hanh) or (va dinh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang x hoi. hieu ve ((cam thuc) OR (cam thu)) ((va hanh) OR (va dinh)) di cua te.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang x hoi. hieu ve ((cam thuc) or (cam thu)) ((va hanh) or (va dinh)) di cua te*.