Perhaps you should try some spelling variations:
"phap thieu o snippets" » "phap hieu o snippets", "phap thiet o snippets", "phap thu o snippets", "phap thieu so snippets", "phap phieu o snippets", "phap thieu mot snippets"
"python using java snippets" » "python using data 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: (((("phap thieu o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap thieu o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap thieu o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap thieu o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.