Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc dao » thuc dan, thuc day, chuc dao
dao hanh » dao thanh, dang hanh, ban hanh
so sach » so sanh, bo sach, co sach
te sach » toc sach
hanh va » hang va, hanh vi
va cua » va chua, via cua, ca 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: ((so sach) or (te sach)) ky nang x hoi. hieu van nam thuc dao hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (te sach)) ky nang x hoi. hieu van nam thuc dao hanh va cua triet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (te sach)) ky nang x hoi. hieu van nam thuc dao hanh va cua triet*.