Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"son tinh cho snippets" » "so tinh cho snippets", "don tinh cho snippets", "son binh cho snippets", "son trinh cho snippets", "son tinh cao snippets", "son tinh co 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: (((("son tinh 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: (((("son tinh cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son tinh cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son tinh cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.