Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, sach tranh
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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 - ((lanh tranh) or (hanh trinh)) cua tong cong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((lanh tranh) OR (hanh trinh)) cua tong cong van toan cau*.