Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
thong cong » trong cong, tong cong, thong thong
tac thanh » bac thanh, cac thanh, tcc thanh
theo chu » cho chu, chao chu, theo yeu
trang va » hang va
tran van » luan van
cong tac » cong ty

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 chieu) OR (theo chu)) sach - hanh ((trang va) OR (tran van)) thong cong tac thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) sach - hanh ((trang va) or (tran van)) thong cong tac thanh san~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) sach - hanh ((trang va) or (tran van)) thong cong tac thanh san*.