Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
thuc dao » thuc dan, thuc day, chuc dao
dao hanh » dao thanh, dang hanh, ban hanh
sach ky » sac ky, sach y, sach ty
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
va cao » va cac, va co, va dao
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. hieu ((va cao) or (ve cac)) thuc dao hanh di ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((va cao) OR (ve cac)) thuc dao hanh di ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu ((va cao) or (ve cac)) thuc dao hanh di ((cua triet) OR (va triet))*".