Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong tan tre snippets" » "cong tac tre snippets", "cong san tre snippets", "cong thanh tre snippets", "cong ban tre snippets", "cong tan trieu snippets", "cong tang tren 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: (((("cong tan tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong tan tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong tan tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tan tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.