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