Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cao » truong cao, trung cap, trung co
hoc hieu » hoc thieu, hoc hien, doc hieu
ung cong » dung cong, luong cong, duong cong
cong tac » cong ty
toan cau » toan tap, toan tai
toan ban » van ban
toan cao » toan tap
cao ung » cao dung, cac ung, cho ung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - thanh trung cao ung cong tac ((((toan cau) OR (toan ban))) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh trung cao ung cong tac ((((toan cau) OR (toan ban))) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - thanh trung cao ung cong tac ((((toan cau) OR (toan ban))) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh trung cao ung cong tac ((((toan cau) OR (toan ban))) or (toan cao))*.