Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"don voi chon snippets" » "don voi con snippets", "don voi phong snippets", "don voi chien snippets", "dong voi chon snippets", "doi voi chon snippets", "don vi chon snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code 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: (((("using java code snippets") or ("don voi chon snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("don voi chon snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( don voi chon snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("don voi chon snippets"))) or ("locating bug code snippets"))*.