Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, can thuc
ve triet » va trien, su triet
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
cam thu » nam thu, cac thu, ca thu
va danh » va dinh, va dan, va hanh
danh de » hanh de, dan de, dang de
te sai » te tai, te bai, te lai
sai ky » sac 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 sai ky tang xa hoi. hieu ve ((cam thuc) OR (cam thu)) va danh de ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky tang xa hoi. hieu ve ((cam thuc) OR (cam thu)) va danh de ve triet".
• Adding a wildcard symbol may retrieve word variants: te sai ky tang xa hoi. hieu ve ((cam thuc) OR (cam thu)) va danh de ve triet*.