Perhaps you should try some spelling variations:
cua nuoc » cua quoc, cua nguoi, cua thuoc
thanh vi » hanh vi, thanh va, thanh ve
quoc ban » quoc bao, quoc lan, quoc quan
hieu van » hieu va, thien van, lieu va
lang mai » lang dai, lang hai, lang man
hieu ve » hieu va
xuc ban » duc ban, cuc ban, xuat ban
mai hoi » mai khoi, dai hoi, lai hoi
tu sach » thu sach, su sach, te sach
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach _ lang mai hoi. ((hieu ve) or (hieu van)) cam ((xuc ban) or (quoc ban)) thanh vi cua nuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach _ lang mai hoi. ((hieu ve) OR (hieu van)) cam ((xuc ban) OR (quoc ban)) thanh vi cua nuoc.
• Adding a wildcard symbol may retrieve word variants: tu sach _ lang mai hoi. ((hieu ve) or (hieu van)) cam ((xuc ban) or (quoc ban)) thanh vi cua nuoc*.