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