Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tham » trung tam, trung thanh, trung thang
tham nhung » thi nhung
nhung cong » dung cong, thong cong, hang cong
mot chieu » doi chieu
ho chieu » theo chieu, hoc thieu, doi chieu
theo chu » theo chieu, cho chu, chao chu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((mot chieu) OR (ho chieu))) OR (theo chu)) xanh - thanh trung tham nhung cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((mot chieu) OR (ho chieu))) or (theo chu)) xanh - thanh trung tham nhung cong tac toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((((mot chieu) OR (ho chieu))) or (theo chu)) xanh - thanh trung tham nhung cong tac toan cau*.