Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cam thuc » am thuc, nam thuc, cam thu
va danh » va dinh, va dan, dia danh
tu bach » vu bach, tu cach, tu hach
va hanh » van hanh, va thanh, ban hanh
hieu ve » hieu va, hieu van
tu bac » tu ban, tu cac, tu bat
ve cam » ve cham, ve cac, va cam
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: ((tu bac) or (tu bach)) ky nang x hoi. hieu ve cam thuc ((va danh) or (va hanh)) va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu bach)) ky nang x hoi. hieu ve cam thuc ((va danh) OR (va hanh)) va su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu bach)) ky nang x hoi. hieu ve cam thuc ((va danh) or (va hanh)) va su triet*.