Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » thuat sach, thuoc sach, thu hoach
vien cac » vien bach, vien dai, vien da
thanh vi » hanh vi, thanh va, thanh ve
tu sach » su sach, te sach, tu cach
tuc ban » thuc ban, truc ban, tu ban
vi cua » vai cua, di cua
cua te » cua tu
ve cac » va cac
ban xa » ban va, ban ma, ban da

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

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