Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luu dan ke snippets" » "luu van ke snippets", "luu hanh ke snippets", "luat dan ke snippets", "luu dan ky snippets", "luu dan ve snippets", "luu ban ke 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: (((("luu dan ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luu dan ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luu dan ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luu dan ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.