Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
su sach » vu sach
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va dan, va hanh
van cam » van nam, van lam, van cau
so sach » so sanh, bo sach, co sach
vi cua » vai cua, di cua
cua te » cua tu
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: ((su sach) or (so sach)) ky nang x hoi. hieu van cam duc ((va thanh) or (va danh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang x hoi. hieu van cam duc ((va thanh) OR (va danh)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang x hoi. hieu van cam duc ((va thanh) or (va danh)) vi cua te*.