Perhaps you should try some spelling variations:
hien khanh » hien hanh, hien nhanh, dien khanh
tien thanh » tien thinh, tran thanh, den thanh
tong thong » thong thong, dong thong, cong thong
hanh phan » thanh phan, anh phan, hanh han
thong tai » truong tai, thong tin, hang tai
phan cua » nhan cua, than cua, phat cua
cua tong » cua cong, cua dong, cua nong
tai toan » bai toan, tap toan, tai tuan
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 khanh) or (tien thanh)) - hanh phan cua tong thong tai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien khanh) OR (tien thanh)) - hanh phan cua tong thong tai toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien khanh) or (tien thanh)) - hanh phan cua tong thong tai toan cau*.