Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
toc sach » hoc sach, doc sach, thuoc sach
dang van » hoang van, hang va
tuc ban » thuc ban, truc ban, tu ban
cua duc » cua tuc, cua nuoc, cua quoc
van hoc » van hoa
va cam » va cham, va cac, va cao
o dang » xo dang, do dang, so dang
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, ve cai

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) or (toc sach)) o dang van hoc. hieu ((ve cam) OR (va cam)) tuc ban thanh vi cua duc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) o dang van hoc. hieu ((ve cam) OR (va cam)) tuc ban thanh vi cua duc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) o dang van hoc. hieu ((ve cam) OR (va cam)) tuc ban thanh vi cua duc".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) o dang van hoc. hieu ((ve cam) OR (va cam)) tuc ban thanh vi cua duc*.