Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bai toan roi snippets" » "bai tap roi snippets", "bai toan hoc snippets", "bai toan tai snippets", "bai toan chi 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: (((("bai toan roi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("bai toan roi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bai toan roi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bai toan roi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.