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