Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thep bieu do snippets" » "thep tieu do snippets", "theo tieu do snippets", "tieu bieu do snippets", "thep bien do snippets", "thep bieu o snippets", "thep bien doi 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: (((("thep bieu 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: (((("thep bieu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thep bieu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thep bieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.