Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cot tiep do snippets" » "cot thep do snippets", "hoa tiep do snippets", "noi tiep do snippets", "cot tiep doi snippets", "cot tiep de snippets", "cot tien do 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: (((("cot tiep do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cot tiep do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cot tiep do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cot tiep do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.