Perhaps you should try some spelling variations:
"doan va chat snippets" » "doan va code snippets", "doan van chat snippets", "doan va phat snippets", "doan va cham snippets", "doanh va chat snippets", "dan va chat snippets", "toan va chat snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data 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: (((("doan va chat snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan va chat snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( doan va chat snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan va chat snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.