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