Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
thuc dan » thuc hanh, hoc dan
vai cua » dai cua, hai cua, lai cua
vu sach » vu bach, su sach, vu khach
van hoi » van hoa, van hoc, van hoe
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
hieu ve » hieu va, hieu van
ve am » va am

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky lang) OR (ky dang)) van hoi. hieu ve am ((thuc dan) OR (thuc vat)) hanh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky lang) OR (ky dang)) van hoi. hieu ve am ((thuc dan) or (thuc vat)) hanh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky lang) OR (ky dang)) van hoi. hieu ve am ((thuc dan) or (thuc vat)) hanh vai cua triet*.