Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
vien nganh » vien thanh
trong quan » thong quan, tong quan, thong quang
hieu xanh » chieu xanh, hieu manh, hieu nganh
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
cong tap » cuong tap, cong tac, cong tan
doan van » hoang van, luan van, tran van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (vien nganh)) - thanh trong quan dung cong tap ((doan van) or (doan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (vien nganh)) - thanh trong quan dung cong tap ((doan van) OR (doan va)).
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (vien nganh)) - thanh trong quan dung cong tap ((doan van) or (doan va))*.