Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc hieu he snippets" » "toc thieu he snippets", "doc hieu he snippets", "hoc thieu he snippets", "toc hieu ve snippets", "toc hiem he snippets", "toc hieu le 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: (((("toc hieu he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc hieu he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc hieu he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc hieu he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.