Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, chieu xanh, hien khanh
cong lang » cong vang, cong luong, cong quang
lang toan » dang toan, lang thang, lang thanh
cua dong » chua dong, cua dang, cua nong
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) OR (hien nhanh)) - hanh trinh ((cua dong) or (cua cong)) cong lang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - hanh trinh ((cua dong) OR (cua cong)) cong lang toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - hanh trinh ((cua dong) or (cua cong)) cong lang toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - hanh trinh ((cua dong) or (cua cong)) cong lang toan cau*.