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
hang cong » dang cong, hang nong, bang cong
cong dang » cong dong, cong dan, cong dung
cao hang » cao dang, cao tang, cao bang
dang van » hoang van, hang va

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 hang cong dang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tach) OR (((hien hanh) OR (thien thanh)))) - thanh trung cao hang cong dang van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) or (((hien hanh) or (thien thanh)))) - thanh trung cao hang cong dang van ban*.