Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"don vu nhan snippets" » "don cu nhan snippets", "don vu ngan snippets", "don tu nhan snippets", "doan vu nhan snippets", "don vi nhan snippets", "don va nhan snippets", "don vu nhan slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("don vu nhan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don vu nhan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don vu nhan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don vu nhan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.