Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"son cong da snippets" » "song cong da snippets", "bon cong da snippets", "san cong da snippets", "son cong dan snippets", "son cong dac snippets", "son cong dau 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: (((("son cong da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("son cong da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son cong da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son cong da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.