Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, can thuc
hanh vai » hanh vi, hanh va, hanh tai
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cam thu » nam thu, cac thu, ca thu
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
vai su » va su, van su, lai su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ma hoi. hieu ve ((cam thuc) or (cam thu)) va hanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu ve ((cam thuc) OR (cam thu)) va hanh vai su triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu ve ((cam thuc) or (cam thu)) va hanh vai su triet*.