Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien hanh » dieu hanh
nang cong » nang song, dang cong, bang cong
cong bang » cuong bang, dong bang, hong bang
hien anh » thien anh, dien anh, tien anh
trung va » truong va, trang va, trung ha
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
va nang » van nang, da nang, cam nang

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 anh) or (hien hanh)) - thanh trung va nang cong bang ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (hien hanh)) - thanh trung va nang cong bang ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien anh) or (hien hanh)) - thanh trung va nang cong bang ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien anh) or (hien hanh)) - thanh trung va nang cong bang ((toan cau) OR (toan cao))*.