Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
chieu xanh » chieu sach, chieu sang, chieu tinh
trong than » trong thanh, trong thuan, trong tan
hieu manh » dieu hanh, hien hanh, hieu van
tranh qua » tranh cua, thanh qua, trinh qua
than phan » thanh phan, toan phan, thanh pham
qua dung » quang dung, su dung, qua song
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (((hieu manh) or (hieu nganh)))) - canh tranh qua dung trong than phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (((hieu manh) OR (hieu nganh)))) - canh tranh qua dung trong than phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (((hieu manh) or (hieu nganh)))) - canh tranh qua dung trong than phan cau*.