Perhaps you should try some spelling variations:
thanh cung » thanh cuong, thanh cong, thanh tung
tong tuong » trong tuong, tuong tuong, tong thuong
hien hanh » dieu hanh
tuong dan » huong dan, tung dan, xuong dan
dien anh » tieng anh, dien dan
cung cap » trung cap
cap tong » cap nong, cap hoang, gap trong
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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 ((dien anh) OR (hien hanh)) - thanh cung cap tong tuong dan than cap~.
• Adding a wildcard symbol may retrieve word variants: hoc ((dien anh) or (hien hanh)) - thanh cung cap tong tuong dan than cap*.