Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tri nhan den snippets" » "tue nhan den snippets", "tri nhan dien snippets", "tri nhan dan snippets", "tri nhan gen 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: (((("tri nhan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tri nhan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tri nhan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tri nhan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.