Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc phung bo snippets" » "duc hung bo snippets", "duc thang bo snippets", "duc dung bo snippets", "duc nhung bo snippets", "duc phung ho snippets", "duc phung cao 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: (((("duc phung bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc phung bo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc phung bo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc phung bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.