Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
te sach » toc sach
tuc ban » thuc ban, truc ban, tu ban
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
xay hoi » tay hoi, cay phoi, gay thoi
sach o » sach lo, sac o, sach y
ve cam » ve cham, ve cac, va cam
o dang » xo dang, do dang, so dang
vi cua » vai cua, di cua

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

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