Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thien van » thi van
cau tren » cu tren, dau tren, ca tren
thanh vi » hanh vi, thanh va, thanh ve
tham soc » cham soc, tham nuoc, thai son
dang xay » dang van, van xay
soc ban » hoc ban, coc ban, so ban
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » lang ha, lang van
vi cau » va cau, ve cau, di cau

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 ky ((lang xa) OR (dang xay)) hoi. ((hieu ve) or (thien van)) tham soc ban thanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((lang xa) OR (dang xay)) hoi. ((hieu ve) OR (thien van)) tham soc ban thanh vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((lang xa) OR (dang xay)) hoi. ((hieu ve) or (thien van)) tham soc ban thanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang xa) OR (dang xay)) hoi. ((hieu ve) or (thien van)) tham soc ban thanh vi cau tren*.