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