Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
de trang » ke trang, de tang, le trang
trang xa » trang va, trang ha, trong xa
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
sach de » cach de, sach dao, sach dat
cam luc » cau luc
hieu ve » hieu va, hieu van

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach de trang xa hoi. hieu ve ((cam luc) OR (cam xuc)) van hanh vi ((cua tre) OR (cau treo))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach de trang xa hoi. hieu ve ((cam luc) OR (cam xuc)) van hanh vi ((cua tre) or (cau treo))~".
• Adding a wildcard symbol may retrieve word variants: tu sach de trang xa hoi. hieu ve ((cam luc) OR (cam xuc)) van hanh vi ((cua tre) or (cau treo))*.