Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
thanh lai » thanh hai, thanh lap, thanh loi
va thanh » gia thanh, ban thanh, va tinh
phan dau » phan tu, hang dau
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
cuu tre » cua tre, cau tren, cau treo
dau va » dau ve, lau va

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