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