Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nen thanh de snippets" » "den thanh de snippets", "yen thanh de snippets", "tien thanh de snippets", "nen hanh de snippets", "nen thanh ve snippets", "nen thanh do 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 thanh de 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 thanh de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nen thanh de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nen thanh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.