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