Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hanh tang » anh tang, hanh mang, hanh tung
cua nhung » va nhung
thu ngan » tu ngan, tai ngan, vu ngan
cong van » cong vang, cong san, song van
tuan ban » tuan bang, toan ban, quang ban
luan ban » luan van, luan san, luan han
hoc thu » hoc thuc, hoc thuy, hoc tu

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 thu ngan - ((hanh tang) OR (hanh trang)) cua nhung cong van ((tuan ban) OR (luan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thu ngan - ((hanh tang) or (hanh trang)) cua nhung cong van ((tuan ban) OR (luan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc thu ngan - ((hanh tang) or (hanh trang)) cua nhung cong van ((tuan ban) OR (luan ban))*.