Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tang van » dang van, hoang van, trong van
van hanh » van thanh, ban hanh, van anh
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
lap van » lap va, tap van, lap ban
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di cua

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

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