Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc quan so snippets" » "ngoc quang so snippets", "ngoc tuan so snippets", "nuoc quan so snippets", "ngoc quan su snippets", "ngoc quan doi snippets", "ngoc quan sat 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: (((("ngoc quan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngoc quan so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc quan so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc quan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.