Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kon dong hoc snippets" » "koh dong hoc snippets", "khong dong hoc snippets", "cong dong hoc snippets", "kon dong co snippets", "kon dong luc 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: (((("kon dong hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kon dong hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kon dong hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kon dong hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.