Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han lap toan snippets" » "han tap toan snippets", "han lap doanh snippets", "han phap toan snippets", "phan lap toan snippets", "dan lap toan 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: (((("han lap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han lap toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han lap toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han lap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.