Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bao van long snippets" » "bao van luong snippets", "bao van dong snippets", "bao van cong snippets", "dao van long snippets", "cao van long snippets", "hao van long 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: (((("bao van long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("bao van long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bao van long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bao van long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.