Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luu chan doc snippets" » "huu chan doc snippets", "luu chat doc snippets", "luu thanh doc snippets", "luu than doc snippets", "luu chau doc 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: (((("luu chan 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: (((("luu chan doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luu chan doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luu chan doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.