Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong don chat snippets" » "cong don code snippets", "cong dong chat snippets", "cong doan chat snippets", "cong dan chat snippets", "cong doc chat snippets", "cong cong chat snippets", "cong dinh chat snippets"
"dung java java snippets" » "dung va java 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 java java snippets") or ("cong don chat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cong don chat snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong don chat snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cong don chat snippets"))) or ("locating bug core snippets"))*.