Perhaps you should try some spelling variations:
ban thanh » ban hang
thien van » thi van
ban hanh » ban hang
lam duc » lam duoc, pham duc, nam duoc
van cau » van dau, van hau, van chat
vu sach » vu bach, su sach, vu khach
van lam » van nam
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cau tre » cau tren, cau treo, cau tra

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty ((nang xa) or (nang ma)) hoi. thien van lam duc ((ban thanh) OR (ban hanh)) van cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((nang xa) OR (nang ma)) hoi. thien van lam duc ((ban thanh) OR (ban hanh)) van cau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty ((nang xa) or (nang ma)) hoi. thien van lam duc ((ban thanh) OR (ban hanh)) van cau tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((nang xa) or (nang ma)) hoi. thien van lam duc ((ban thanh) OR (ban hanh)) van cau tre*.