Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tich vu cua snippets" » "dich vu cua snippets", "tich va cua snippets", "tich du cua snippets", "tich hu cua snippets", "tich tu 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: (((("tich vu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tich vu cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tich vu cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tich vu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.