Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
c va » co va, cu va, _ va

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 ve cac nuoc ((((van hanh) or (va danh))) or (ban thanh)) c va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ve cac nuoc ((((van hanh) OR (va danh))) OR (ban thanh)) c va triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ve cac nuoc ((((van hanh) or (va danh))) or (ban thanh)) c va triet*.