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