Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
van hanh » ban hanh, van anh, van ban
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va dau » va dao

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 ty nang xa hoi. lieu va dau tu ((van hanh) OR (van thanh)) dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va dau tu ((van hanh) OR (van thanh)) dai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. lieu va dau tu ((van hanh) OR (van thanh)) dai cua triet*.