Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hiem ngan » kim ngan, viem gan
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
thanh cao » thanh thao, thanh cham, thanh chau
thanh cac » hanh cac, thanh bac, tranh cac
hoc hiem » hoc hien, hoc thieu, hoc thiet
tran van » luan van
cong van » cong vang, cong san, song van
thanh ca » thanh cha, thanh ha, thanh va

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 hiem ngan - hanh tran van nhung cong van ((thanh cao) OR (((thanh cac) OR (thanh ca))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hiem ngan - hanh tran van nhung cong van ((thanh cao) or (((thanh cac) OR (thanh ca))))~".
• Adding a wildcard symbol may retrieve word variants: hoc hiem ngan - hanh tran van nhung cong van ((thanh cao) or (((thanh cac) OR (thanh ca))))*.