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