Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
quan anh » quan hanh, quang anh, tuan anh
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cac dac » cac dan, cac dai, cac bac
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 ((ty nang) OR (ty hang)) xa hoi. lieu va cac dac ((van hanh) or (quan anh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty hang)) xa hoi. lieu va cac dac ((van hanh) OR (quan anh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty hang)) xa hoi. lieu va cac dac ((van hanh) or (quan anh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ty hang)) xa hoi. lieu va cac dac ((van hanh) or (quan anh)) vi cua triet*.