Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh tran » trinh trang, trinh toan, trinh tren
tran hoang » tran hong, quan hoang, tran quang
hoang cong » hang cong, hoang long, hoang vuong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
tran chau » tranh chap, tran huu
cong ban » cong bang, cong san, cong tan
tran cau » toan cau, ran cau, tra cau

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 hanh)) - hanh trinh tran hoang cong ban ((tran cau) OR (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - hanh trinh tran hoang cong ban ((tran cau) OR (tran chau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - hanh trinh tran hoang cong ban ((tran cau) OR (tran chau))*".