Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
cao duc » dao duc, cao suc, tao duoc
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu lang
tu nano » truc nano
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 ((tu nang) or (tu nano)) x hoi. hieu va ((cao duc) OR (giao duc)) va thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tu nano)) x hoi. hieu va ((cao duc) OR (giao duc)) va thanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) or (tu nano)) x hoi. hieu va ((cao duc) OR (giao duc)) va thanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) or (tu nano)) x hoi. hieu va ((cao duc) OR (giao duc)) va thanh tai cua tre*.