Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chi chang o2 snippets" » "thi chang o2 snippets", "chi nhanh o2 snippets", "thi hang o2 snippets", "chi hang o2 snippets", "chi chan o snippets", "chi chang ha 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 chang o2 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 chang o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chi chang o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chi chang o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.