Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van tham » van thanh, van chat, van tai
van tuan » van quan, van ban, anh tuan
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
duc ban » duc tan, duc van, dua ban
vi cua » vai cua, di cua
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: vu sach ky nang x hoi. hieu ((van tham) or (van tuan)) duc ban hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. hieu ((van tham) OR (van tuan)) duc ban hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu ((van tham) or (van tuan)) duc ban hanh vi cua triet*.