Perhaps you should try some spelling variations:
thanh trung » thanh tung
duong trong » dung trong
vien nganh » vien thanh
trung tuan » trung thanh, trung tam, tran tuan
dong trong » dung trong, cong trong, dong thong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tran van » luan 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 trung tuan ((dong trong) OR (duong 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 tuan ((dong trong) OR (duong trong)) tran van ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (vien nganh)) - thanh trung tuan ((dong trong) OR (duong trong)) tran van ban*".