Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don quang ca snippets" » "doan quang ca snippets", "dong quang ca snippets", "do quang ca snippets", "don quang cao snippets", "don quang cua snippets", "don quang cu 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: (((("don quang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don quang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don quang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don quang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.