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