Perhaps you should try some spelling variations:
"nhat trien khai hoc" » "phat trien khai hoc", "nhat tien khai hoc", "chat thien khai hoc", "nhat trien khi hoc", "nhat trien khai thac", "nhat trien khai hoan"
"phap trien thai hoc" » "phat trien thai hoc", "phap truyen thai hoc", "phap tieng thai hoc", "phap trien thi hoc", "phap trien thanh hoc", "phap trien thuat hoc", "phap trien dai hoc", "phap trien bai hoc", "phap trien hoi hoc"
"pham trien nha thuoc" » "phat trien nha thuoc", "pham tien nha thuoc", "pham tren nha thuoc", "pham trien he thuoc", "pham trien nha nuoc", "pham trien nhan thuc", "pham trien nha hoc"

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: (((("nhat trien khai hoc") or ("phap trien thai hoc"))) or ("pham trien nha thuoc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat trien khai hoc") OR ("phap trien thai hoc"))) OR ("pham trien nha thuoc")).
• Removing quotes may allow a broader search: (((( nhat trien khai hoc ) or ( phap trien thai hoc ))) or ( pham trien nha thuoc )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat trien khai hoc") or ("phap trien thai hoc"))) or ("pham trien nha thuoc"))*.