Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"sach chi cua snippets" » "sach chi code snippets", "sach che cua snippets", "sach nha cua snippets", "sach bai cua snippets", "sach chi cuc snippets", "sach khi cua snippets", "sach cuoi cua 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 chi 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: (((("sach chi cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( sach chi cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach chi cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.