Perhaps you should try some spelling variations:
canh trang » canh tranh, hanh trang, banh trang
hien xanh » hien hanh, hien nhanh, chieu xanh
tong cong » trong cong, cong cong, dung cong
trang va » tran van, hang va
cong san » cong tac
quan cau » quang cao, toan cau, quan cua
va tong » va thong, va tuong, va trong
quan ha » quan he

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 - canh trang va tong cong san ((quan cau) OR (quan ha))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh trang va tong cong san ((quan cau) OR (quan ha))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh trang va tong cong san ((quan cau) OR (quan ha))*.