Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh dat » thanh san, thanh hai, thanh van
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, dua tren
cac duc » cac du, cao duc, cac dac
te sach » toc sach
song xa » song cua
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac

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