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