Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van pham » san pham, van phan, van phat
ban hanh » ban hang
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va pham » va phat, va phap, va phan
duc ban » duc tan, duc van, dua ban
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: su sach ky nang x hoi. hieu ((va pham) or (van pham)) duc ban hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((va pham) OR (van pham)) duc ban hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ((va pham) or (van pham)) duc ban hanh dai cua triet*.