Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"moi cong que snippets" » "noi cong que snippets", "voi cong que snippets", "tai cong que snippets", "moi cong quy snippets", "moi thong que snippets", "moi huong que 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: (((("moi cong que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("moi cong que snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( moi cong que snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("moi cong que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.