Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che cuu hoan snippets" » "che luu hoang snippets", "che cuu van snippets", "che cuu khoa snippets", "cham cuu hoan snippets", "cheo cua hoan 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 cuu hoan 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 cuu hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che cuu hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che cuu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.