Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
van cham » van chat, van tham, van pham
lang xa » lang ha, dang xay, lang van
va cham » va chat, va tham
cuu ban » cuu van, cua ban, cuu san
nang xa » nang x, nang ma, mang xa
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (lang xa)) hoi. hieu ((van cham) OR (va cham)) cuu ban hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (lang xa)) hoi. hieu ((van cham) OR (va cham)) cuu ban hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) or (lang xa)) hoi. hieu ((van cham) OR (va cham)) cuu ban hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (lang xa)) hoi. hieu ((van cham) OR (va cham)) cuu ban hanh vi cua triet*.