Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lon tinh can snippets" » "long tinh can snippets", "loc tinh can snippets", "don tinh can snippets", "lon tinh cao snippets", "lon tinh ca snippets", "lon minh can 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: (((("lon tinh can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lon tinh can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lon tinh can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lon tinh can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.