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