Perhaps you should try some spelling variations:
"cong van chinh snippets" » "cong va chinh snippets", "cong van thinh snippets", "cong hanh chinh snippets", "cong vang chinh snippets", "cong san chinh snippets", "song van chinh snippets", "cong van chinh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("cong van chinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong van chinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong van chinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong van chinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.