Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chi cong so snippets" » "thi cong so snippets", "cho cong so snippets", "phi cong so snippets", "chi cong san snippets", "chi cong hoa snippets"
"locating bug code snippets" » "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: (((("chi cong so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chi cong so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chi cong so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chi cong so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.