Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lanh dao le snippets" » "lanh do le snippets", "lanh dao ve snippets", "lanh hao le snippets", "lan dao le snippets", "anh dao le snippets", "hanh dao le 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: (((("lanh dao le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lanh dao le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lanh dao le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lanh dao le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.