Errors:
Attribute “xmlns:fb” not allowed here.
Attribute “xmlns:og” not allowed here.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “handheld” for attribute “media” on element “link”: Deprecated media type “handheld”. For guidance, see the Media Types section in the current Media Queries specification.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.
Bad value “523” for attribute “rel” on element “a”: The string “523” is not a registered keyword.
Attribute “tag” not allowed on element “a” at this point.
Attribute “rel” not allowed on element “div” at this point.
Attribute “tag” not allowed on element “div” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Text not allowed in element “iframe” in this context.
Bad value “574” for attribute “rel” on element “a”: The string “574” is not a registered keyword.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
This document appears to be written in Vietnamese. Consider adding “lang="vi"” (or variant) to the “html” start tag.
Viet Nam VN