Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
bang cong » dang cong, bang song, hang cong
tung tam » trung tam, dung tam, tuong tac
vung tam » vung tau, vung tay, trung tam
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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 - thanh ((tung tam) or (vung tam)) bang cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh ((tung tam) OR (vung tam)) bang cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh ((tung tam) or (vung tam)) bang cong tac toan cao*.