Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lieu ve do snippets" » "lieu va do snippets", "hieu ve do snippets", "lieu de do snippets", "lieu ve dao snippets", "lieu ve doi 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: (((("lieu ve do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lieu ve do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lieu ve do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lieu ve do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.