Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong tac lon snippets" » "cong tac lon snippets", "dong tai lon snippets", "dong bac lon snippets", "dong tap lon snippets", "dong tac dong snippets", "dong tac chon 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: (((("dong tac lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong tac lon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tac lon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tac lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.