Perhaps you should try some spelling variations:
"dao vung code snippets" » "dao vung co snippets", "dan vung code snippets", "dao cuong code snippets", "dao van code snippets", "dao vung code slippers"
"van hung code snippets" » "van dung code snippets", "manh hung code snippets", "van duong code snippets", "van hung code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dao vung code snippets") or ("van hung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao vung code snippets") OR ("van hung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao vung code snippets ) or ( van hung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao vung code snippets") or ("van hung code snippets"))) or ("locating bug code snippets"))*.