Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lieu gac do snippets" » "lieu bac do snippets", "lieu giao do snippets", "lieu ngay do snippets", "lieu giac do snippets", "lieu goc do snippets", "lieu gap do 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 gac 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 gac do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lieu gac do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lieu gac do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.