Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu trieu do snippets" » "thu tieu do snippets", "chua trieu do snippets", "thu dieu do snippets", "thu trien do snippets", "thu trieu dai snippets", "thu trien dot 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: (((("thu trieu 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: (((("thu trieu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu trieu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu trieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.