Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"truc xa cho snippets" » "tuc xa cho snippets", "truc va cho snippets", "truoc xay cho snippets", "truc xa cao snippets", "truc xa pho 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: (((("truc xa cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("truc xa cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( truc xa cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truc xa cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.