Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc li toi snippets" » "duoc si toi snippets", "duoc ly toi snippets", "duoc lieu toi snippets", "duoc li thoi snippets", "duoc di toi snippets", "duoc li tai 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: (((("duoc li toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc li toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc li toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc li toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.