Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh ca » hanh cac, hanh cat, hanh cua
luc va » duc va, tuc va, loc va
ve co » vo co, de co, ke co
va co » vo co
ca va » co va, cu va, c 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 ky nang xa hoi. hieu ((ve co) OR (va co)) luc va hanh ca va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((ve co) OR (va co)) luc va hanh ca va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((ve co) OR (va co)) luc va hanh ca va triet*.