Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"biet dung he snippets" » "viet dung he snippets", "biet nhung he snippets", "viet duong he snippets", "biet dung cho 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: (((("biet dung 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: (((("biet dung he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( biet dung he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("biet dung he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.