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 ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ve nam » he nam, va nam, te nam
le nam » ly nam, he nam, le na
vi cua » vai cua, di 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 ((ve nam) OR (le nam)) thuc ((van hanh) or (van thanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((ve nam) OR (le nam)) thuc ((van hanh) OR (van thanh)) vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((ve nam) OR (le nam)) thuc ((van hanh) or (van thanh)) vi cua triet*".