Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong thi loc snippets" » "cong thai loc snippets", "cong khi loc snippets", "dong thi loc snippets", "cong chi loc snippets", "cong thi goc snippets", "cong thi lo 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 thi loc 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 thi loc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong thi loc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong thi loc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.