Perhaps you should try some spelling variations:
thanh trung » thanh tung
vien nganh » vien thanh
dong trong » duong trong, dung trong, cong trong
trong tran » trong trang, trong tranh, trong tan
hieu xanh » chieu xanh, hieu manh, hieu nganh
trung ca » trung cap, truong ca, trung cua
tran van » luan van
ca dong » cao dong, cau dong, cua dong

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 trung ca dong trong tran van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (vien nganh)) - thanh trung ca dong trong tran van ban*.