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
tu sach » thu sach, su sach, te sach
ky lang » ky tang, tay lang
ky dang » ky danh
nam cuc » nam cac, nam cua, nam thuc
cuc ban » cua ban, cac ban, cuu ban
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: tu sach ((ky lang) or (((ky dang) or (ky nang)))) xa hoi. hieu van nam cuc ban thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (((ky dang) OR (ky nang)))) xa hoi. hieu van nam cuc ban thanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (((ky dang) or (ky nang)))) xa hoi. hieu van nam cuc ban thanh vai cua triet*.