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