Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan luat du snippets" » "phap luat du snippets", "phan xuat du snippets", "phan lap du snippets", "phan luat dau snippets", "phan luat su snippets", "phan luat tu 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 luat 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 luat du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan luat du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan luat du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.