Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra li cong snippets" » "tra bi cong snippets", "tra li song snippets", "tra lieu cong snippets", "tra loi cong snippets", "tra linh cong 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 li cong 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 li cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra li cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra li cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.