Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thien van » thi van
dang xay » dang van, van xay
hieu van » hieu va, lieu va, hieu ve
tham soc » cham soc, tham nuoc, thai son
thanh vi » hanh vi, thanh va, thanh ve
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
soc ban » hoc ban, coc ban, so ban
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 dang xay hoi. ((hieu van) 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 dang xay hoi. ((hieu van) OR (thien van)) tham soc ban thanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: te sach ky dang xay hoi. ((hieu van) or (thien van)) tham soc ban thanh vi cau tren*.