Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cau tren » cu tren, dau tren, ca tren
thanh vi » hanh vi, thanh va, thanh ve
tham soc » cham soc, tham nuoc, thai son
hieu van » hieu va, thien van, lieu va
soc ban » hoc ban, coc ban, so ban
te sach » toc sach
thi van » thi lan, thi hanh, thi nang
sach ky » sac ky, sach y, sach ty
van hoe » van hoa, van hoc, van hieu
van hoi » van hoa, van hoc, van loi
ky lang » ky nang, ky dang, ky tang
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 ((van hoi) OR (van hoe)). ((hieu van) or (thi 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 ((van hoi) OR (van hoe)). ((hieu van) OR (thi 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 ((van hoi) OR (van hoe)). ((hieu van) or (thi van)) tham soc ban thanh vi cau tren*".