Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi hien so snippets" » "doi dien so snippets", "doi bien so snippets", "doi kien so snippets", "doi khien so snippets", "doi hieu so 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 hien so 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 hien so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi hien so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi hien so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.