Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong dot cua snippets" » "cong mot cua snippets", "cong dong cua snippets", "cong doan cua snippets", "cong doi cua snippets", "cong do cua snippets", "cong dat cua 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 dot cua 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 dot cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dot cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dot cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.