Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc tham do snippets" » "doc tam do snippets", "doc than do snippets", "doc thau do snippets", "doc thai do snippets", "doc pham do snippets", "doc tham du 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: (((("doc tham 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: (((("doc tham do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc tham do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc tham do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.