Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
thuc day » thuc dan, thuc vat
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan
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: thu sach ky nang x hoi. hieu van nam ((thuc va) or (thuc day)) thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu van nam ((thuc va) OR (thuc day)) thanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. hieu van nam ((thuc va) or (thuc day)) thanh vai cua triet*.