Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
luoc van » luoc can, luoc va, luot van
de trang » ke trang, de tang, le trang
trang xa » trang va, trang ha, trong xa
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
sach de » cach de, sach dao, sach dat
hieu ve » hieu va, hieu van
luc van » luu van, duc van, luc va
ve cam » ve cham, ve cac, va cam

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 van) OR (luoc 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 van) OR (luoc 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 van) OR (luoc van)) hanh vi ((cua tre) or (cau treo))*.