Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan hieu co snippets" » "luan tieu co snippets", "luan dieu co snippets", "luan thiet co snippets", "luan hieu so snippets", "luan hieu bo snippets", "luan hieu ca 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: (((("luan hieu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan hieu co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan hieu co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan hieu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.