Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
tuc van » thuc van, truc van, tuc va
ve cham » va cham, ve chat, vu cham
cua duc » cua tuc, cua nuoc, cua quoc
tao hoi » tao khoi, tao boi, thao hoc
tay hoi » tay ho, tay thai
y dang » ky dang, 2 dang, _ dang
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao

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