Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van tham » van thanh, van tuan, van chat
hieu van » hieu va, thien van, lieu va
tham duc » pham duc, tham du, than duc
sach ky » sac ky, sach ty, sach kem
duc ban » duc tan, duc van, dua ban
hanh di » hanh vi, hanh de, danh di
hang di » hang doi, hang vi, hang dien
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 ky) or (sach y)) nang x hoi. hieu van tham duc ban ((hanh di) OR (hang di)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang x hoi. hieu van tham duc ban ((hanh di) OR (hang di)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) nang x hoi. hieu van tham duc ban ((hanh di) OR (hang di)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang x hoi. hieu van tham duc ban ((hanh di) OR (hang di)) cua triet*.