Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
thien quan » trien quang, lien quan, thien van
vien quan » lien quan, van quan, tin quan
thong tap » thong cap, tong tap, thong tai
doanh va » doan va, doanh tai, doanh cua
va thong » va thuong, va phuong, he thong
tap toan » tap doan, tap quan, bai 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 ((thien quan) or (vien quan)) - hanh doanh va thong thong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien quan) OR (vien quan)) - hanh doanh va thong thong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien quan) or (vien quan)) - hanh doanh va thong thong tap toan cau*.