Perhaps you should try some spelling variations:
dang than » dang thanh, sang than, dang tran
hieu van » hieu va, thien van, lieu va
cau nuoc » cap nuoc, cac nuoc, dau nuoc
than cua » nhan cua, thai cua, ban cua
su sach » so sach, vu sach
van cau » van dau, van hau, van chat
va dang » van dang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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 y nang x hoi. hieu van cau nuoc va dang than cua tre~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu van cau nuoc va dang than cua tre*.