Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chap khe doc snippets" » "phap che doc snippets", "cam khe doc snippets", "chat khi doc snippets", "chap ke doc snippets", "chap khe uoc snippets", "chap che duoc 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: (((("chap khe doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chap khe doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chap khe doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chap khe doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.