Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"trinh van cu snippets" » "trinh han cu snippets", "trinh quan cu snippets", "trinh toan cu snippets", "trinh van cau snippets", "trinh van chu snippets", "trinh van cua 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 cu 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 cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh van cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh van cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.