Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi hanh son snippets" » "doc hanh son snippets", "doi khang son snippets", "thi hanh son snippets", "doi thanh son snippets", "doi khanh son snippets", "doi hoanh 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 hanh 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 hanh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi hanh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi hanh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.