Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh hang » thanh hang, hang hang, hanh mang
luan dong » luan cong, quan dong, luan nong
dong cong » duong cong, dung cong, dang cong
hanh han » hanh nhan, hanh phan, hanh san
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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 ((hien xanh) or (tien thanh)) - ((hanh hang) OR (hanh han)) luan dong cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (tien thanh)) - ((hanh hang) OR (hanh han)) luan dong cong tan toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (tien thanh)) - ((hanh hang) OR (hanh han)) luan dong cong tan toan cau*".