Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bang hoc so snippets" » "nang hoc so snippets", "mang hoc so snippets", "quang hoc so snippets", "bang hoc co snippets", "bang hoc su snippets", "bang hoc bo 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: (((("bang hoc 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: (((("bang hoc so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bang hoc so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bang hoc so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.