Perhaps you should try some spelling variations:
thanh giau » thanh gian, thanh giang, thanh lieu
van thanh » ban thanh, van tuan
giau cua » gian cua, gia cua, dieu cua
sach tu » sach thu, cach tu, sach uu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
sach ty » sach y, sach thu, xach tay
hieu va » lieu va, hieu qua
lo van » le van, vo van, so van
cua te » cua tu
cac lo » cac lop, cac co, cac bo

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: thu ((sach ty) OR (sach tu)) nang xa hoi. ((hieu ve) OR (hieu va)) cac lo van thanh giau cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) or (sach tu)) nang xa hoi. ((hieu ve) OR (hieu va)) cac lo van thanh giau cua te~".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) or (sach tu)) nang xa hoi. ((hieu ve) OR (hieu va)) cac lo van thanh giau cua te*.