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