Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
dan thuc » dan toc, am thuc
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
qua dan » qua danh, qua ban, cua dan
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) OR (toc sach)) tu nang xa hoi. hieu qua dan thuc van hanh vai ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) tu nang xa hoi. hieu qua dan thuc van hanh vai ((cua tre) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) tu nang xa hoi. hieu qua dan thuc van hanh vai ((cua tre) or (cau treo))*".