Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hanh dao » lanh dao, thanh dat, thanh dam
tu sach » thu sach, su sach, te sach
ty lang » tay lang, ty xang, tu lang
ty hang » ly hang, ty xang, thi hang
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
dao cua » dai cua, day cua, dan cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty lang) OR (ty hang)) xa hoi. lieu va cac tuc van hanh dao cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty lang) OR (ty hang)) xa hoi. lieu va cac tuc van hanh dao cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty lang) OR (ty hang)) xa hoi. lieu va cac tuc van hanh dao cua triet*.