Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"trinh van he snippets" » "trinh han he snippets", "trinh quan he snippets", "trinh toan he snippets", "trinh van hoe snippets", "trinh van hue snippets", "trinh van de 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: (((("trinh van he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh van he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh van he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh van he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.