Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
cam tuc » cam tu, nam thuc, dam thuc
su sach » so sach, vu sach
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
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: su sach ((ky tang) OR (ky dang)) ma hoi. hieu ve ((cam tuc) or (cam xuc)) van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky tang) OR (ky dang)) ma hoi. hieu ve ((cam tuc) OR (cam xuc)) van hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky tang) OR (ky dang)) ma hoi. hieu ve ((cam tuc) or (cam xuc)) van hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky tang) OR (ky dang)) ma hoi. hieu ve ((cam tuc) or (cam xuc)) van hanh vi cua triet*.