Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
bao duc » dao duc, bao luc, cao duc
luu tre » luu tru, cuu tre, luy tre
ve bao » te bao, va bao
vi luu » vi lua
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 (vu bach)) ky nang x hoi. hieu ve bao duc ((van hanh) or (van thanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu bach)) ky nang x hoi. hieu ve bao duc ((van hanh) OR (van thanh)) vi luu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu bach)) ky nang x hoi. hieu ve bao duc ((van hanh) or (van thanh)) vi luu tre*.