Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan thu moi snippets" » "van thu moi snippets", "luan thuc moi snippets", "dan thuc moi snippets", "lan thi moi snippets", "lan tho moi snippets", "lan thu hoi 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: (((("lan thu moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan thu moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan thu moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan thu moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.