Perhaps you should try some spelling variations:
thanh day » thanh dat, thanh tay, thanh dam
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam truc » nam truoc, nam thuc, nam trung
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
truc va » thuc va, thuc vat, trung va
day cua » dai 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: te sach ((ty nang) OR (ty hang)) x hoi. hieu van nam truc va thanh day cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ty hang)) x hoi. hieu van nam truc va thanh day cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) OR (ty hang)) x hoi. hieu van nam truc va thanh day cua triet*.