Perhaps you should try some spelling variations:
van triet » va triet, van trieu, hanh triet
van thiet » va thiet, dan thiet, can thiet
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
lang ha » long ha
va hanh » van hanh, va thanh, va danh
y lang » o lang, _ lang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
nam tu » nam thu, nam thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y lang ha hoi. hieu van ((nam tu) or (am thuc)) va hanh vi ((van triet) OR (van thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y lang ha hoi. hieu van ((nam tu) OR (am thuc)) va hanh vi ((van triet) OR (van thiet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y lang ha hoi. hieu van ((nam tu) or (am thuc)) va hanh vi ((van triet) OR (van thiet))*".