Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hoc do snippets" » "duoc hoc do snippets", "luc hoc do snippets", "du hoc do snippets", "duc hoc doi snippets", "duc hoc co snippets", "duc hoc bo 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 hoc do 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 hoc do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hoc do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.