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