Perhaps you should try some spelling variations:
trung quan » truong quan, trong quan, trung tuan
chi xanh » chi anh, chi danh, chi hanh
tung qua » dung qua, tuong quan, duong qua
dung tac » dung tai, dung cac, dung tay
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - thanh ((tung qua) or (trung quan)) trinh dung tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - thanh ((tung qua) OR (trung quan)) trinh dung tac toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - thanh ((tung qua) or (trung quan)) trinh dung tac toan cau*.