Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"toc sach hoi snippets" » "toc sach code snippets", "hoc sach hoi snippets", "doc sach hoi snippets", "thuoc sach hoi snippets", "toc sach doi snippets", "toc sach moi snippets", "toc cach thoi 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 sach hoi 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 sach hoi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( toc sach hoi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc sach hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.