Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trang » canh tranh, hanh trinh, minh trang
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
cua nhung » va nhung
cong tac » cong ty
tac luan » tac quan, tao luan, tang luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - ((hanh trang) OR (thanh trung)) cua nhung cong tac luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((hanh trang) OR (thanh trung)) cua nhung cong tac luan van".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((hanh trang) OR (thanh trung)) cua nhung cong tac luan van*.