Perhaps you should try some spelling variations:
hanh dieu » han dieu, hinh dieu, hoang dieu
van cham » van chat, van tham, va cham
dieu cua » dieu tra
quoc ban » quoc bao, quoc lan, quoc quan
hieu van » hieu va, thien van, lieu va
luoc ban » luoc can, buoc ban, duoc ban
sach ty » sach tu, sach thu, xach tay
cua tre » cua te, cuu tre, cua triet
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: te ((sach y) or (sach ty)) nang x hoi. hieu van cham ((luoc ban) OR (quoc ban)) hanh dieu cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach y) OR (sach ty)) nang x hoi. hieu van cham ((luoc ban) OR (quoc ban)) hanh dieu cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach y) or (sach ty)) nang x hoi. hieu van cham ((luoc ban) OR (quoc ban)) hanh dieu cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach y) or (sach ty)) nang x hoi. hieu van cham ((luoc ban) OR (quoc ban)) hanh dieu cua tre*.