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