Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don moi con snippets" » "doi moi con snippets", "do moi con snippets", "doanh moi con snippets", "don moi cong snippets", "don moi co snippets", "don mot con 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: (((("don moi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don moi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don moi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don moi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.