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