Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hang » ngan hang
tham cuu » cham cuu, tham cung, thai cua
van tham » van thanh, van tuan, van chat
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
hang vi » hang va, hanh vi, hang di
cuu ban » cuu van, cua ban, cuu san
nang xa » nang x, lang xa, nang ma
tu bach » vu bach, tu cach, tu hach
vi cua » vai cua, di cua
tu bac » tu ban, tu cac, tu bat

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 xa) or (dang xay)) hoi. hieu van tham cuu ban hang vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu bach)) ky ((nang xa) OR (dang xay)) hoi. hieu van tham cuu ban hang vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu bach)) ky ((nang xa) or (dang xay)) hoi. hieu van tham cuu ban hang vi cua triet*.