Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"chap danh co snippets" » "chap danh code snippets", "chap hanh co snippets", "nhap doanh co snippets", "hop danh co snippets", "chap danh cho snippets", "chap doanh co snippets", "chap anh co 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: (((("chap danh co snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chap danh co snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( chap danh co snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chap danh co snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.