Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan va hoi snippets" » "luan van hoi snippets", "luat va hoi snippets", "luan xa hoi snippets", "luan va hoc snippets", "luan va hoa 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 va hoi 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 va hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan va hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan va hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.