Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
va tinh » may tinh
va dinh » van dinh, va kinh, vu dinh
va hanh » van hanh, va thanh, va danh
van cac » van hac, van cau, van bac
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
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: so sanh ky dang xay hoi. hieu van cac du ((va hanh) or (((va dinh) or (va tinh)))) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky dang xay hoi. hieu van cac du ((va hanh) OR (((va dinh) OR (va tinh)))) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sanh ky dang xay hoi. hieu van cac du ((va hanh) or (((va dinh) or (va tinh)))) vi cua tre*.