Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bich van do snippets" » "tich van do snippets", "bach van do snippets", "binh van do snippets", "bich van dao snippets", "bich van de snippets", "bich 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: (((("bich van 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: (((("bich van do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bich van do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bich van do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.