Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mo muong do snippets" » "o muong do snippets", "toc muong do snippets", "mo rong do snippets", "mo muong o snippets", "mo muong so snippets", "mo cuong do 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: (((("mo muong do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mo muong do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mo muong do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mo muong do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.