Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
luan thuong » luat thuong, lan thuong, luan phuong
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
hien xanh » hien hanh, hien nhanh, hien khanh
van tai » von tai, van tuan

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) or (chieu xanh)) - hanh trinh luan thuong cong ((van tai) or (van ban)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - hanh trinh luan thuong cong ((van tai) OR (van ban)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh trinh luan thuong cong ((van tai) or (van ban)) cao*.