Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luat du cham snippets" » "luat dau cham snippets", "luat su cham snippets", "luat tu cham snippets", "luat du chat snippets", "luat vu cham 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: (((("luat du cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luat du cham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luat du cham snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luat du cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.