Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan tra cuu snippets" » "phan trac cuu snippets", "thanh tra cuu snippets", "khanh tra cuu snippets", "phan tra cau snippets", "phan trau cua snippets", "phan trua cua 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: (((("phan tra cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan tra cuu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan tra cuu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan tra cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.