Perhaps you should try some spelling variations:
cdieu hanh » chieu xanh, deu hanh, dieu danh
trong vang » trong van, trong dang, trong tang
tong luan » tang luan, dung luan, hang luan
luan dung » lan dung, luan dong, luan hung
vang toan » van toan, dang toan, quang toan
toan cao » toan ban, toan tap
ha tong » han tong, ha dong, ha tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((dieu hanh) or (cdieu hanh)) - ha tong luan dung trong vang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((dieu hanh) OR (cdieu hanh)) - ha tong luan dung trong vang toan cao.
• Adding a wildcard symbol may retrieve word variants: doc ((dieu hanh) or (cdieu hanh)) - ha tong luan dung trong vang toan cao*.