Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che van canh snippets" » "che van anh snippets", "che van hanh snippets", "che van manh snippets", "chu van canh snippets", "che va canh snippets", "chi van canh 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: (((("che van canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("che van canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che van canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che van canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.