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