Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nen dung co snippets" » "yen dung co snippets", "tien dung co snippets", "benh dung co snippets", "nen dung cho snippets", "nen dung cong snippets", "nen dung cua 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: (((("nen dung co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nen dung co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nen dung co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nen dung co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.