Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
cong thanh » dong thanh, cong trinh, cong tan
thanh tran » thanh trang, thanh toan, thanh tra
theo yeu » theo tieu, thiet yeu, theo chu
tang van » dang van, hoang van, trong van
tran tap » toan tap, tran tan, tran tuan
theo te » theo tu, theo tieu
tang va » trang va, thang va, tang vat

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: ((theo te) OR (theo yeu)) sach - hanh ((tang va) OR (tang van)) thong 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 va) OR (tang van)) thong cong thanh tran tap~".
• Adding a wildcard symbol may retrieve word variants: ((theo te) or (theo yeu)) sach - hanh ((tang va) OR (tang van)) thong cong thanh tran tap*.