Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chap van chi snippets" » "phap van chi snippets", "chao van chi snippets", "chau van chi snippets", "chap van chien snippets", "chap luan chi snippets", "chap van chat 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 van chi 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 van chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chap van chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chap van chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.