Perhaps you should try some spelling variations:
phuong thong » phuong trong, thong thong, phuong hoang
hanh doanh » hang doanh, chinh doanh, doanh doanh
thien quan » trien quang, lien quan, thien van
vien quan » lien quan, van quan, tin quan
va phuong » va thuong, cac phuong
doanh va » doan va, doanh tai, doanh cua
tap toan » tap quan, bai toan
tap doan » tap quan

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 phuong thong ((tap toan) or (tap doan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien quan) OR (vien quan)) - hanh doanh va phuong thong ((tap toan) OR (tap doan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien quan) or (vien quan)) - hanh doanh va phuong thong ((tap toan) or (tap doan)) cau*.