Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
nguyen xuan » nguyen van
nhung cong » thong cong, hang cong, nhung don
van nguyen » toan nguyen, tran nguyen, xuan nguyen
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
truong va » truong dai, truong cao, truong dao
dung cong » dung trong

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) OR (hien hanh)) - thanh truong va ((nhung cong) or (dung cong)) van nguyen xuan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - thanh truong va ((nhung cong) OR (dung cong)) van nguyen xuan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - thanh truong va ((nhung cong) or (dung cong)) van nguyen xuan".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - thanh truong va ((nhung cong) or (dung cong)) van nguyen xuan*.