Perhaps you should try some spelling variations:
tang thanh » dang thanh, trung thanh, hoang thanh
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, thu hoach
doi nang » dai nang, hoi nang, voi nang
hieu van » hieu va, thien van, lieu va
duc tang » duc thang, duc tan, tuc tang
tu sach » su sach, te sach, tu cach
van bao » van ban, van dao
bao duc » dao duc, bao luc, cao duc
vai cua » dai cua, hai cua, lai cua
x hoi » xa hoi, o hoi, x ho

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) OR (thu sach)) doi nang x hoi. hieu van bao duc tang thanh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) doi nang x hoi. hieu van bao duc tang thanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) doi nang x hoi. hieu van bao duc tang thanh vai cua triet*.