Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"o cong khanh snippets" » "o cong thanh snippets", "o cong khan snippets", "o cong nhan snippets", "bo cong khanh snippets", "so cong khanh snippets", "_ cong khanh snippets", "o cong khanh slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("o cong khanh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("o cong khanh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( o cong khanh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("o cong khanh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.