Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan nam he snippets" » "van nam he snippets", "dong nam he snippets", "dinh nam he snippets", "dan nam ha snippets", "dan nam hien snippets", "dan nam nghe 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: (((("python using java snippets") or ("dan nam he snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("dan nam he snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( dan nam he snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("dan nam he snippets"))) or ("locating bug code snippets"))*.