Perhaps you should try some spelling variations:
truc ban » thuc ban, truc dan, truc van
sach dao » lanh dao
ban hanh » ban hang
hanh di » hanh vi, hanh de, hang di
xay hoi » tay hoi, cay phoi, gay thoi
sach va » sach xa, sach ha, sach nha
hieu ve » hieu va, hieu van
di cua » dai cua, doi cua, de cua
cua te » cua tu
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach va) or (sach dao)) dang ((xay hoi) OR (xa hoi)). hieu ve cau truc ban hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach va) OR (sach dao)) dang ((xay hoi) OR (xa hoi)). hieu ve cau truc ban hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach va) or (sach dao)) dang ((xay hoi) OR (xa hoi)). hieu ve cau truc ban hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach va) or (sach dao)) dang ((xay hoi) OR (xa hoi)). hieu ve cau truc ban hanh di cua te*.