Perhaps you should try some spelling variations:
thanh trinh » thanh tinh, thanh binh, thanh trung
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
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 - ((thanh trinh) OR (hanh trinh)) va nhung cong san ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((thanh trinh) OR (hanh trinh)) va nhung cong san ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((thanh trinh) OR (hanh trinh)) va nhung cong san ((toan cau) OR (toan cao))*.