Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat toan he snippets" » "nhat tan he snippets", "thuat toan he snippets", "nhat trang he snippets", "nhat toan ho snippets", "nhat toan ke snippets", "nhat toan ve 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: (((("nhat toan 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: (((("nhat toan he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat toan he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat toan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.