Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
sach van » sach han, sach va, bach van
van quan » van ban
dien cu » dien cuc, dien cua, dien tu
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
quan xa » quan ha, quan va, quan cua
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao
cu te » cua te, tu te, cu de

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: doc sach van quan xa hoi. hieu ((ve cham) OR (va cham)) hoc ((va dan) OR (ca dan)) dien cu te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach van quan xa hoi. hieu ((ve cham) or (va cham)) hoc ((va dan) OR (ca dan)) dien cu te~".
• Adding a wildcard symbol may retrieve word variants: doc sach van quan xa hoi. hieu ((ve cham) or (va cham)) hoc ((va dan) OR (ca dan)) dien cu te*.