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