Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"son tung cao snippets" » "son tang cao snippets", "con trung cao snippets", "son tinh cao snippets", "son nung cao snippets", "son truong cao snippets", "son trung cap 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 tung cao 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 tung cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son tung cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son tung cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.