Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mong quan so snippets" » "tong quan so snippets", "hong quan so snippets", "uong quan so snippets", "mong quan su snippets", "mong quan doi snippets", "mong 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: (((("mong 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: (((("mong quan so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mong quan so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mong quan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.