Perhaps you should try some spelling variations:
danh dien » dinh dien, danh kien, danh lien
qua than » qua thanh, qua phan, qua tan
than soc » than doc, than hoc, than so
dien cuc » dien tu, dieu cua, vien cac
va danh » va dinh, va dan, va hanh
cuc tre » duc tre, cua tre, cuu tre
sach v » sach va, sach 2, sach vay
soc va » hoc va, loc va, doc va
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 v) or (sach y)) nang x hoi. hieu qua than soc va danh dien cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach y)) nang x hoi. hieu qua than soc va danh dien cuc tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach y)) nang x hoi. hieu qua than soc va danh dien cuc tre*.