Perhaps you should try some spelling variations:
hanh vai » hanh va, hanh tai, hanh van
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
thuc va » thuc dan, thuc day
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu nano
cuu tre » cua tre, cau tren, cau treo
va do » va dao, va doc, va co
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 x hoi. hieu va do ((thuc va) OR (thuc vat)) ((hanh vai) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang x hoi. hieu va do ((thuc va) OR (thuc vat)) ((hanh vai) OR (hanh vi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang x hoi. hieu va do ((thuc va) OR (thuc vat)) ((hanh vai) or (hanh vi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang x hoi. hieu va do ((thuc va) OR (thuc vat)) ((hanh vai) or (hanh vi)) cuu tre*.