Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat van cu snippets" » "nhat ban cu snippets", "nha van cu snippets", "nhan van cu snippets", "nhat van cau snippets", "nhat van chu snippets", "nhat van cua 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: (((("nhat van cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat van cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat van cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat van cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.