Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh hai » thanh hoa, thanh san
can thuc » dan thuc, van thuc, cay thuc
thuc day » thuc dan, thuc vat
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
hieu va » hieu qua
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
cua tre » cua te, cuu tre, cua triet

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 xa hoi. ((hieu va) or (lieu va)) can thuc day ((thanh hai) OR (thanh phan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang xa hoi. ((hieu va) OR (lieu va)) can thuc day ((thanh hai) OR (thanh phan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang xa hoi. ((hieu va) or (lieu va)) can thuc day ((thanh hai) OR (thanh phan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. ((hieu va) or (lieu va)) can thuc day ((thanh hai) OR (thanh phan)) cua tre*.