Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
nhung cong » dung cong, hang cong, nhung don
tang thanh » dang thanh, trung thanh, hoang thanh
thanh chau » thanh cha, thanh cham, thanh chu
hanh tran » hanh trang, thanh tran, hanh tram
tran van » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((25 trieu) OR (30 trieu)) tinh - hanh tran van ((nhung cong) or (thong cong)) tang thanh chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((25 trieu) OR (30 trieu)) tinh - hanh tran van ((nhung cong) OR (thong cong)) tang thanh chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((25 trieu) OR (30 trieu)) tinh - hanh tran van ((nhung cong) or (thong cong)) tang thanh chau".
• Adding a wildcard symbol may retrieve word variants: ((25 trieu) OR (30 trieu)) tinh - hanh tran van ((nhung cong) or (thong cong)) tang thanh chau*.