Perhaps you should try some spelling variations:
"duong va code snippets" » "duong van code snippets", "dung va code snippets", "luong va code snippets", "duong va code slippers"
"dung vbugs code snippets" » "dung vbugs code slippers", "dung vbungs code snippets", "dung vbugss code snippets"
"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: (((("duong va code snippets") or ("dung vbugs code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong va code snippets") OR ("dung vbugs code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong va code snippets ) or ( dung vbugs code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong va code snippets") or ("dung vbugs code snippets"))) or ("locating bug code snippets"))*.