Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
sang tay » sang tao, sang tai, sang tac
van hanh » van thanh, ban hanh, van anh
duc van » duc va, duc tan, duc manh
hanh di » hanh vi, hanh de, hang di
su sach » so sach
hieu ve » hieu va, hieu van
vu sach » vu bach, vu khach
ve pham » vi pham, v pham, ve phan
tay o » tay co

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (vu sach)) _ sang tay o. hieu ve pham duc van hanh di ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) _ sang tay o. hieu ve pham duc van hanh di ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) _ sang tay o. hieu ve pham duc van hanh di ((cua triet) or (va triet))*".