Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luong du he snippets" » "luong duc he snippets", "luong duy he snippets", "luong tu he snippets", "luong do he snippets", "luong du ha 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: (((("luong du 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: (((("luong du he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong du he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong du he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.