Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cach tieu du snippets" » "sach thieu du snippets", "cach bien du snippets", "cach tu du snippets", "cach tieu su snippets", "cach tiep du snippets", "cach tieu dung 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: (((("cach tieu 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: (((("cach tieu du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cach tieu du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cach tieu du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.