Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi hieu do snippets" » "thi chieu do snippets", "thi hien do snippets", "thi dieu do snippets", "thi hieu so snippets", "thi hieu bo snippets", "thi bieu do 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: (((("thi hieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi hieu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi hieu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi hieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.