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