Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hanh can snippets" » "duc thanh can snippets", "duc anh can snippets", "du hanh can snippets", "duc hanh san snippets", "duc hanh cac snippets", "duc hanh cat 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: (((("duc hanh can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc hanh can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hanh can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hanh can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.