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