Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan van que snippets" » "nhan dan que snippets", "nhan va que snippets", "phan van que snippets", "nhan van quy snippets", "nhan van due snippets", "nhan 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: (((("nhan 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: (((("nhan van que snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan van que snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan van que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.