Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong su hoc snippets" » "cong suc hoc snippets", "cong sua hoc snippets", "cong cu hoc snippets", "cong tu hoc snippets", "cong du hoc snippets", "cong so hoc 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: (((("cong su 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: (((("cong su hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong su hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong su hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.