Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao huu toan snippets" » "nao huu tuan snippets", "nao cuu toan snippets", "nao huy toan snippets", "dao huu toan snippets", "ngoc huu toan snippets", "nuoc huu toan 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: (((("nao huu toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nao huu toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao huu toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao huu toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.