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