Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao cuu hoan snippets" » "nao luu hoang snippets", "nao cuu van snippets", "nao cuu khoa snippets", "khao cuu hoan 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: (((("nao cuu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nao cuu hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao cuu hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao cuu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.