Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
ban hanh » ban hang
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
van dau » phan dau
duc ban » duc tan, duc van, dua ban

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

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