Perhaps you should try some spelling variations:
thanh dat » thanh hai, thanh van, thanh ha
hieu van » hieu va, thien van, lieu va
te sach » toc sach
van cac » van hac, van cau, van bac
cac duc » cac du, cao duc, cac dac
y sang » duy sang
_ sang » _ san
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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: te sach ((y sang) OR (_ sang)) ma hoi. hieu van cac duc va ((thanh dat) OR (thanh san)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y sang) or (_ sang)) ma hoi. hieu van cac duc va ((thanh dat) OR (thanh san)) cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y sang) or (_ sang)) ma hoi. hieu van cac duc va ((thanh dat) OR (thanh san)) cua te*.