Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doc sach cac snippets" » "doc sach code snippets", "hoc sach cac snippets", "toc sach cac snippets", "nuoc sach cac snippets", "doc sach cap snippets", "doc sach bac snippets", "doc sach dao 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: (((("doc sach cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc sach cac snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( doc sach cac snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc sach cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.