Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nen cong le snippets" » "neon cong le snippets", "nien cong le snippets", "nen mong le snippets", "nen cuong le snippets", "nen cong li snippets", "nen hong le 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: (((("nen cong le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nen cong le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nen cong le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nen cong le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.