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