Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi lan cot snippets" » "thi hanh cot snippets", "thi nang cot snippets", "thi lien cot snippets", "thi bang cot snippets", "thi lan cuoi snippets", "thi lang mot 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 lan cot 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 lan cot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi lan cot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi lan cot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.