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