Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham thi tre snippets" » "pham thi tren snippets", "pham thi tra snippets", "pham thi tran snippets", "phan thi tre 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 thi tre 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 thi tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham thi tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham thi tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.