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