Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan van que snippets" » "pham van que snippets", "thanh van que snippets", "luan van que snippets", "phan van quy snippets", "phan van due snippets", "phan van hue 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: (((("phan van que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan van que snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan van que snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan van que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.