Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi anh son snippets" » "doi hanh son snippets", "doi canh son snippets", "doi sanh son snippets", "doi anh dong snippets", "doi tinh son 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: (((("doi anh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi anh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi anh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi anh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.