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