Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
thanh trung » thanh tung
thiet tach » chiet tach, thien hach, thuat tach
hien hanh » dieu hanh
trung cao » truong cao, trung cap, trung co
han cong » phan cong, hang cong, hanh cong
cong san » cong tac
cao han » cao nhan, cao phan, cao van
san van » tan 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: hoc ((thiet tach) OR (((hien hanh) OR (thien thanh)))) - thanh trung cao han cong san van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) OR (((hien hanh) OR (thien thanh)))) - thanh trung cao han cong san van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) OR (((hien hanh) OR (thien thanh)))) - thanh trung cao han cong san van ban*.