Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra luan de snippets" » "tra quan de snippets", "tranh luan de snippets", "tran xuan de snippets", "tra luan den snippets", "tra luan ve snippets", "tra luat de 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: (((("tra luan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra luan de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra luan de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra luan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.