Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan kiem du snippets" » "phan kien du snippets", "phan mem du snippets", "van kiem du snippets", "phan diem du snippets", "phan hiem du snippets", "phan kiem thu 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 kiem du 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 kiem du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan kiem du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan kiem du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.