Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
van cam » van nam, van lam, van cau
sach uu » sach luu, sach tu, sach xu
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 ty) or (sach uu)) nang x hoi. hieu van cam xuc ((van hanh) OR (ban hanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach uu)) nang x hoi. hieu van cam xuc ((van hanh) OR (ban hanh)) vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach uu)) nang x hoi. hieu van cam xuc ((van hanh) OR (ban hanh)) vai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach uu)) nang x hoi. hieu van cam xuc ((van hanh) OR (ban hanh)) vai cua triet*.