Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"sach xa cau snippets" » "sach xa code snippets", "sach dao cau snippets", "sach nha cau snippets", "sach bai cau snippets", "sach xa chau snippets", "sach va cau snippets", "sach xa cao 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: (((("sach xa cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach xa cau snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( sach xa cau snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach xa cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.