Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc chao chu snippets" » "duoc chat chu snippets", "buoc chao chu snippets", "duc hau chu snippets", "duc cho chu snippets", "duc cua chu snippets", "duc cao cho 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: (((("duc chao chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc chao chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc chao chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc chao chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.