Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"huu hieu he snippets" » "huu hiep he snippets", "thuc hieu he snippets", "thau hieu he snippets", "huu hieu ve snippets", "huu hiem he snippets", "huu 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: (((("huu 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: (((("huu hieu he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( huu hieu he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("huu hieu he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.