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