Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
can thuc » dan thuc, van thuc, cay thuc
sach thu » sach thue, sach thieu, sach tham
thuc dan » thuc hanh, hoc dan, thuc vat
thu nang » thi nang, thu hang, thu bang
hieu va » lieu va, hieu qua
hanh va » hanh vi
cuu tre » cua tre, cau treo
te sach » toc sach
va can » va chan, va cac, va cao
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 thu nang x hoi. hieu va can thuc dan ((hanh va) OR (hang va)) ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu nang x hoi. hieu va can thuc dan ((hanh va) OR (hang va)) ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu nang x hoi. hieu va can thuc dan ((hanh va) OR (hang va)) ((cuu tre) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: te sach thu nang x hoi. hieu va can thuc dan ((hanh va) OR (hang va)) ((cuu tre) or (cau tren))*.