Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
thanh hang » thanh hoang, thanh thang, tranh hang
hien xanh » hien hanh, hien nhanh, chieu xanh
cua thong » cua thuong, cua khong, cua tong
thong tai » truong tai, thong tin, hang tai
hang cua » mang cua, hang ca, huong cua
tai toan » bai toan, tap toan, tai tuan
toan tap » toan ban

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 (tran thanh)) - thanh hang cua thong thong tai toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (tran thanh)) - thanh hang cua thong thong tai toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (tran thanh)) - thanh hang cua thong thong tai toan tap*.