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