Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den tra cho snippets" » "den tran cho snippets", "dan tra cho snippets", "dien trac cho snippets", "den trang cho snippets", "den tra chat snippets", "den toan cho 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: (((("den tra cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den tra cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den tra cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den tra cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.