Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
ve chat » va chat, van chat
tuc van » thuc van, truc van, tuc va
xay hoi » xa hoi, tay hoi, cay phoi
cua duc » cua tuc, cua nuoc, cua quoc
y dang » ky dang, 2 dang, _ dang
vi cua » vai cua, di cua

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