Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cap sach moi snippets" » "cap sac moi snippets", "cao sach moi snippets", "cau sach moi snippets", "cap sach doi snippets", "cap sach hoi snippets", "cap bach mai snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("cap sach moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cap sach moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cap sach moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cap sach moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.