Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, mot chieu
hanh tang » hanh trang, anh tang, hanh mang
ho chieu » theo chieu, hoc thieu, mot chieu
tang qua » tang quan, tang cua, tang quy
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: ((ho chieu) or (doi chieu)) sach - hanh tang qua ((nhung cong) OR (thong cong)) van tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - hanh tang qua ((nhung cong) OR (thong cong)) van tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sach - hanh tang qua ((nhung cong) OR (thong cong)) van tuan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - hanh tang qua ((nhung cong) OR (thong cong)) van tuan ban*.