Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong de cua snippets" » "cong da cua snippets", "cong ve cua snippets", "cong dieu cua snippets", "cong le cua snippets", "cong te 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 de 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 de cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong de cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong de cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.