Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don thuan co snippets" » "dong thuan co snippets", "dinh thuan co snippets", "doan chuan co snippets", "don thuat co snippets", "don chuan co snippets", "don khuan co 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: (((("don thuan co 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 thuan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don thuan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don thuan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.