Perhaps you should try some spelling variations:
dang xay » dang van, van xay
so sanh » do sanh
cac duc » cac du, cao duc, cac dac
va dinh » van dinh, va kinh, va tinh
sanh ky » hanh ky, sang ky, nganh ky
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
ve cac » va cac, vien cac
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky dang xay hoi. hieu ve cac duc ((va hanh) or (va dinh)) ((vi cua) OR (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky dang xay hoi. hieu ve cac duc ((va hanh) OR (va dinh)) ((vi cua) OR (di cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky dang xay hoi. hieu ve cac duc ((va hanh) or (va dinh)) ((vi cua) OR (di cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sanh ky dang xay hoi. hieu ve cac duc ((va hanh) or (va dinh)) ((vi cua) OR (di cua)) tre*.