Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc cong lo snippets" » "hoc co lo snippets", "cac cong lo snippets", "hoc dung lo snippets", "hoc cong lon snippets", "hoc cong so snippets", "hoc cong co 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 cong lo 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 cong lo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc cong lo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc cong lo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.