Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
lang van » tang van, hoang van, giang van
dang van » hoang van, hang va
su sach » so sach, vu sach
cua tre » cuu tre, cua triet, dua tren
sach ty » sach y, sach tu, sach thu
duc van » duc va, duc tan, duc manh
qua ca » qua cac, qua cua, qua cai
ca duc » cao duc, cua duc, ca dua
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: su sach ty ((lang van) OR (dang van)) hoi. hieu qua ca duc van thanh vi ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((lang van) OR (dang van)) hoi. hieu qua ca duc van thanh vi ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((lang van) OR (dang van)) hoi. hieu qua ca duc van thanh vi ((cua tre) or (cua te))*.