Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"toc nhan cua snippets" » "toc nhan code snippets", "goc nhan cua snippets", "hoc nhan cua snippets", "tac nhan cua snippets", "toc nhat cua snippets", "toc nhan luc snippets", "toc nhan su 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: (((("toc nhan cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc nhan cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( toc nhan cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc nhan cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.