Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"trong moi do snippets" » "trong doi do snippets", "trong mot do snippets", "trong thoi do snippets", "trong moi doi snippets", "trong moi co snippets", "trong moi de 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: (((("trong moi 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: (((("trong moi do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trong moi do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong moi do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.