Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
danh hai » dang hai, lanh hai, manh hai
xuat ban » luat ban, xuat san, thuat ban
cuu tre » cua tre, cau treo
su sach » so sach, vu sach
duc ban » duc tan, duc van, dua ban
sach ty » sach y, sach tu, sach thu
dang xa » dang xay, lang xa, dang ha
ty dang » ty xang, ky dang, ty hang
va cam » va cham, va cac, va cao

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: su sach ty dang xa hoi. lieu va cam ((xuat ban) OR (duc ban)) danh hai ((cuu tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty dang xa hoi. lieu va cam ((xuat ban) or (duc ban)) danh hai ((cuu tre) OR (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: su sach ty dang xa hoi. lieu va cam ((xuat ban) or (duc ban)) danh hai ((cuu tre) OR (cau tren))*.