Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hai cong snippets" » "thu thai cong snippets", "thu tai cong snippets", "thu hai long snippets", "thu ha cong snippets", "thu nhap cong snippets", "thu hang cong 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: (((("thu hai cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu hai cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hai cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hai cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.