Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"nam van cuc snippets" » "nam van code snippets", "nam dan cuc snippets", "nam va cuc snippets", "pham van cuc snippets", "nam van duc snippets", "nam van luc snippets", "nam van cu snippets"
"python using java snippets" » "python using data 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: (((("nam van cuc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam van cuc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( nam van cuc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam van cuc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.