Perhaps you should try some spelling variations:
phuong thong » phuong trong, thong thong, phuong hoang
hien quang » dien quang, bien quang, hien quan
thinh doan » chinh doanh, hinh toan
va phuong » va thuong, cac phuong
thong van » trong van, thong va, thong quan
thi doan » thai doan, thi hoan, thi loan
toan tap » toan ban
toan cao » toan 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 - ((thinh doan) OR (thi doan)) va phuong thong van ((toan tap) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien quang - ((thinh doan) OR (thi doan)) va phuong thong van ((toan tap) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien quang - ((thinh doan) OR (thi doan)) va phuong thong van ((toan tap) or (toan cao))*.