Perhaps you should try some spelling variations:
tuong thong » thong thong, tong thong, tuong tuong
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
mang luan » tang luan, bang luan, mong luan
hang luan » tang luan, dung luan
thong tap » thong cap, tong tap, thong tai
tap toan » tap doan, tap quan, bai toan
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 (hien nhanh)) - hanh ((mang luan) or (hang luan)) tuong thong tap toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - hanh ((mang luan) OR (hang luan)) tuong thong tap toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - hanh ((mang luan) or (hang luan)) tuong thong tap toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - hanh ((mang luan) or (hang luan)) tuong thong tap toan tap*.