Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
nhung cong » dung cong, thong cong, hang cong
anh quang » anh xquang, nhanh quang, tinh quang
cua nhung » va nhung
anh quan » anh tuan, ban quan, anh nhan
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan ban » tuan bang, toan ban, luan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dieu hanh) or (hien nhanh)) - ((anh quang) OR (anh quan)) cua nhung cong van tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (hien nhanh)) - ((anh quang) OR (anh quan)) cua nhung cong van tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((dieu hanh) or (hien nhanh)) - ((anh quang) OR (anh quan)) cua nhung cong van tuan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (hien nhanh)) - ((anh quang) OR (anh quan)) cua nhung cong van tuan ban*.