Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hang vo snippets" » "thi hang vo snippets", "thuc hanh vo snippets", "thu huong vo snippets", "thu hang va snippets", "thu hang vi snippets", "thu hang ve 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 hang vo 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 hang vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hang vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hang vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.