Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
va hanh » va thanh, va danh, ban hanh
hanh di » hanh vi, hanh de, hang di
tu sach » thu sach, su sach, te sach
van ha » van hoa, van chat, van phan
sach v » sach va, sach y, sach 2
xuc va » duc va, tuc va, luc va
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach v nang x ho. hieu ((van ha) OR (van hanh)) xuc va hanh di ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x ho. hieu ((van ha) OR (van hanh)) xuc va hanh di ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang x ho. hieu ((van ha) OR (van hanh)) xuc va hanh di ((cua triet) or (va triet))*".