Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quang cho he snippets" » "quang cao he snippets", "quang pho he snippets", "quang chi he snippets", "quang cho thue 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: (((("quang cho he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quang cho he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quang cho he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quang cho he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.