Perhaps you should try some spelling variations:
"using san cong snippets" » "using san code snippets", "using sat cong snippets", "using a cong snippets", "sinh san cong snippets", "using sang cong snippets", "using van cong snippets", "using ban cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"hang java java snippets" » "hang 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: (((("using san cong snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using san cong snippets") OR ("hang java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using san cong snippets ) or ( hang java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using san cong snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))*.