Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran ka so snippets" » "tran ku so snippets", "tran khoa so snippets", "tran van so snippets", "tran ma so snippets", "tran va so 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: (((("tran ka so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran ka so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran ka so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran ka so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.