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