Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc van cuc snippets" » "quoc va cuc snippets", "quoc ban cuc snippets", "quoc lan cuc snippets", "quoc van duc snippets", "quoc van luc snippets", "quoc van cu 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: (((("quoc van cuc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quoc van cuc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc van cuc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc van cuc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.