Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra cuu den snippets" » "tra cau den snippets", "trau cua den snippets", "trua cua den snippets", "tra cuu de snippets", "tra buu dien 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 cuu 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: (((("tra cuu den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra cuu den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra cuu den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.