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