Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa can tre snippets" » "khoa cam tre snippets", "khoa cap tre snippets", "khoi can tre snippets", "khoa ban tre snippets", "khoa van tren snippets", "khoa dan tren 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: (((("khoa can tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa can tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa can tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa can tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.