Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu thanh pd snippets" » "thu thang pd snippets", "tu thanh pd snippets", "thuan thanh pd snippets", "thu thanh pho snippets", "thu thanh ha snippets", "thu thanh _ 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: (((("thu thanh pd snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu thanh pd snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu thanh pd snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu thanh pd snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.