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