Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
vien cac » vien bach, vien dai, vien da
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
sach van » sach han, sach va, bach van
vi cua » vai cua, di cua
ve cac » va cac
ban ma » ban va
ban xa » ban va, ban da, ban a
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach van ((ban xa) OR (ban ma)) hoi. hieu ((ve cac) or (vien cac)) duc va thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach van ((ban xa) OR (ban ma)) hoi. hieu ((ve cac) OR (vien cac)) duc va thanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach van ((ban xa) OR (ban ma)) hoi. hieu ((ve cac) or (vien cac)) duc va thanh vi cua te*".