Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vi » hanh vi, dinh vi, danh di
cuu san » cuu van, cua san, cuu nang
cuu ban » cuu van, cua ban, cuu nang
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
ve chat » va chat, van chat
vi cua » vai cua, di cua

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 ((ky lang) OR (ky dang)) van hoi. hieu ve chat ((cuu ban) or (cuu san)) danh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) van hoi. hieu ve chat ((cuu ban) OR (cuu san)) danh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) OR (ky dang)) van hoi. hieu ve chat ((cuu ban) or (cuu san)) danh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) OR (ky dang)) van hoi. hieu ve chat ((cuu ban) or (cuu san)) danh vi cua triet*.