Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"man viet ca snippets" » "mang viet ca snippets", "san viet ca snippets", "mai viet ca snippets", "man viet ha snippets", "man viet co snippets", "man viet a 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: (((("man viet ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("man viet ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( man viet ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("man viet ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.