Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"pham tu doc snippets" » "pham tu code snippets", "phan tu doc snippets", "pham thi doc snippets", "pham tai doc snippets", "pham tu duoc snippets", "pham tu hoc snippets", "pham tu do snippets"
"python using java snippets" » "python using data 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 tu doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham tu doc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( pham tu doc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham tu doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.