Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu nhat he snippets" » "hieu luat he snippets", "hieu suat he snippets", "biet nhat he snippets", "hieu nhat ve snippets", "hieu nhat le snippets", "hieu nhat 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: (((("hieu nhat he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu nhat he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu nhat he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu nhat he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.