Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hanh cho snippets" » "duc thanh cho snippets", "duc anh cho snippets", "du hanh cho snippets", "duc danh cho snippets", "duc han cho snippets", "duc hang cho 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 cho 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 cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hanh cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hanh cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.