Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
cao hoi » cau hoi, co hoi, cao hoc
van cau » van dau, van hau, van chat
qua ban » cua ban, qua quan
vai cua » dai cua, hai cua, lai cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sach ty)) nang cao hoi. hieu van cau qua ban thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang cao hoi. hieu van cau qua ban thanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach ty)) nang cao hoi. hieu van cau qua ban thanh vai cua triet*.