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