Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vien dai » hien dai
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien da, gian cac
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
ly cua » le 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 nang xa hoi. hieu ((vien cac) OR (vien dai)) nuoc ((van hanh) or (va danh)) ly cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((vien cac) OR (vien dai)) nuoc ((van hanh) OR (va danh)) ly cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((vien cac) OR (vien dai)) nuoc ((van hanh) or (va danh)) ly cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((vien cac) OR (vien dai)) nuoc ((van hanh) or (va danh)) ly cua triet*.