Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cham nen doi snippets" » "cham den doi snippets", "cham nhin doi snippets", "cham ninh doi snippets", "cham neu doi snippets", "cham bien doi snippets", "cham kien doi 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: (((("cham nen doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cham nen doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cham nen doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cham nen doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.