Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
nhung cong » dung cong, thong cong, hang cong
thanh tran » thanh trang, thanh toan, thanh tra
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
theo yeu » theo tieu, thiet yeu, theo chu
tran tap » toan tap, tran tan, tran tuan
theo te » theo tu, theo tieu

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

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