Perhaps you should try some spelling variations:
cam thuc » nam thuc, cam thu, can thuc
ve triet » va trien, su triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
danh de » hanh de, dan de, dang de
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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 lang xa hoi. hieu ve ((cam thuc) OR (am thuc)) va danh de ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. hieu ve ((cam thuc) OR (am thuc)) va danh de ve triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. hieu ve ((cam thuc) OR (am thuc)) va danh de ve triet*.