Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vuong den bo snippets" » "huong den bo snippets", "tuong den bo snippets", "cuong den bo snippets", "vuong den o snippets", "vuong den do snippets", "vuong ben bo 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: (((("vuong den bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vuong den bo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vuong den bo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vuong den bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.