Perhaps you should try some spelling variations:
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
tru nang » tra nang, tri nang, truc nano
can thuc » dan thuc, van thuc, cay thuc
te sach » toc sach
hanh va » hang va, hanh vi
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va
tu nang » tu nong, tu nano, tu lang
va cuu » va cau, va chu, va huu
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 (tru nang)) x hoi. ((hieu va) or (hieu qua)) can thuc dan hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tru nang)) x hoi. ((hieu va) OR (hieu qua)) can thuc dan hanh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) OR (tru nang)) x hoi. ((hieu va) or (hieu qua)) can thuc dan hanh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) OR (tru nang)) x hoi. ((hieu va) or (hieu qua)) can thuc dan hanh va cuu tre*.