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