Perhaps you should try some spelling variations:
phuong thong » phuong trong, thong thong, phuong hoang
hien quang » dien quang, bien quang, hien quan
thanh toan » thanh hoa, thanh san, tinh toan
hanh doan » hanh doanh, thinh doan, nhanh hoan
va phuong » va thuong, cac phuong
thong van » trong van, thong va, thong quan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien quang - ((hanh doan) OR (thanh toan)) va phuong thong van ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien quang - ((hanh doan) OR (thanh toan)) va phuong thong van ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien quang - ((hanh doan) OR (thanh toan)) va phuong thong van ((toan cau) or (toan ban))*.