Perhaps you should try some spelling variations:
tien thanh » tien thinh, den thanh
tran thanh » ban thanh, van thanh, quan thanh
hanh trinh » canh tranh, hanh chinh
trinh qua » trinh quan, trinh cua, trinh quang
tong cong » trong cong, cong cong, dung cong
qua tong » qua trong, qua song, qua cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
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 ((tien thanh) OR (tran thanh)) - hanh trinh qua tong cong san toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien thanh) OR (tran thanh)) - hanh trinh qua tong cong san toan cau*".